1894 lines
62 KiB
C
1894 lines
62 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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#include "strtoofft.h"
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_NET_IF_H
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#include <net/if.h>
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#endif
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#ifdef HAVE_SYS_IOCTL_H
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#include <sys/ioctl.h>
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#endif
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#ifdef HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#ifndef HAVE_SOCKET
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#error "We can't compile without socket() support!"
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#endif
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#include "urldata.h"
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#include <curl/curl.h>
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#include "netrc.h"
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#include "content_encoding.h"
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#include "hostip.h"
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#include "transfer.h"
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#include "sendf.h"
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#include "speedcheck.h"
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#include "progress.h"
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#include "http.h"
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#include "url.h"
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#include "getinfo.h"
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#include "vtls/vtls.h"
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#include "select.h"
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#include "multiif.h"
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#include "connect.h"
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#include "non-ascii.h"
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#include "http2.h"
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#include "mime.h"
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#include "strcase.h"
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#include "urlapi-int.h"
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/* The last 3 #include files should be in this order */
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#include "curl_printf.h"
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#include "curl_memory.h"
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#include "memdebug.h"
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#if !defined(CURL_DISABLE_HTTP) || !defined(CURL_DISABLE_SMTP) || \
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!defined(CURL_DISABLE_IMAP)
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/*
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* checkheaders() checks the linked list of custom headers for a
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* particular header (prefix). Provide the prefix without colon!
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*
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* Returns a pointer to the first matching header or NULL if none matched.
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*/
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char *Curl_checkheaders(const struct connectdata *conn,
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const char *thisheader)
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{
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struct curl_slist *head;
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size_t thislen = strlen(thisheader);
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struct Curl_easy *data = conn->data;
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for(head = data->set.headers; head; head = head->next) {
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if(strncasecompare(head->data, thisheader, thislen) &&
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Curl_headersep(head->data[thislen]) )
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return head->data;
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}
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return NULL;
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}
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#endif
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CURLcode Curl_get_upload_buffer(struct Curl_easy *data)
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{
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if(!data->state.ulbuf) {
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data->state.ulbuf = malloc(data->set.upload_buffer_size);
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if(!data->state.ulbuf)
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return CURLE_OUT_OF_MEMORY;
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}
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return CURLE_OK;
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}
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#ifndef CURL_DISABLE_HTTP
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/*
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* This function will be called to loop through the trailers buffer
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* until no more data is available for sending.
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*/
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static size_t Curl_trailers_read(char *buffer, size_t size, size_t nitems,
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void *raw)
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{
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struct Curl_easy *data = (struct Curl_easy *)raw;
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Curl_send_buffer *trailers_buf = data->state.trailers_buf;
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size_t bytes_left = trailers_buf->size_used-data->state.trailers_bytes_sent;
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size_t to_copy = (size*nitems < bytes_left) ? size*nitems : bytes_left;
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if(to_copy) {
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memcpy(buffer,
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&trailers_buf->buffer[data->state.trailers_bytes_sent],
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to_copy);
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data->state.trailers_bytes_sent += to_copy;
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}
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return to_copy;
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}
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static size_t Curl_trailers_left(void *raw)
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{
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struct Curl_easy *data = (struct Curl_easy *)raw;
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Curl_send_buffer *trailers_buf = data->state.trailers_buf;
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return trailers_buf->size_used - data->state.trailers_bytes_sent;
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}
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#endif
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/*
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* This function will call the read callback to fill our buffer with data
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* to upload.
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*/
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CURLcode Curl_fillreadbuffer(struct connectdata *conn, size_t bytes,
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size_t *nreadp)
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{
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struct Curl_easy *data = conn->data;
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size_t buffersize = bytes;
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size_t nread;
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curl_read_callback readfunc = NULL;
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void *extra_data = NULL;
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#ifdef CURL_DOES_CONVERSIONS
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bool sending_http_headers = FALSE;
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if(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)) {
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const struct HTTP *http = data->req.protop;
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if(http->sending == HTTPSEND_REQUEST)
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/* We're sending the HTTP request headers, not the data.
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Remember that so we don't re-translate them into garbage. */
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sending_http_headers = TRUE;
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}
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#endif
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#ifndef CURL_DISABLE_HTTP
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if(data->state.trailers_state == TRAILERS_INITIALIZED) {
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struct curl_slist *trailers = NULL;
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CURLcode c;
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int trailers_ret_code;
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/* at this point we already verified that the callback exists
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so we compile and store the trailers buffer, then proceed */
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infof(data,
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"Moving trailers state machine from initialized to sending.\n");
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data->state.trailers_state = TRAILERS_SENDING;
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data->state.trailers_buf = Curl_add_buffer_init();
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if(!data->state.trailers_buf) {
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failf(data, "Unable to allocate trailing headers buffer !");
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return CURLE_OUT_OF_MEMORY;
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}
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data->state.trailers_bytes_sent = 0;
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Curl_set_in_callback(data, true);
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trailers_ret_code = data->set.trailer_callback(&trailers,
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data->set.trailer_data);
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Curl_set_in_callback(data, false);
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if(trailers_ret_code == CURL_TRAILERFUNC_OK) {
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c = Curl_http_compile_trailers(trailers, data->state.trailers_buf, data);
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}
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else {
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failf(data, "operation aborted by trailing headers callback");
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*nreadp = 0;
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c = CURLE_ABORTED_BY_CALLBACK;
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}
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if(c != CURLE_OK) {
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Curl_add_buffer_free(&data->state.trailers_buf);
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curl_slist_free_all(trailers);
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return c;
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}
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infof(data, "Successfully compiled trailers.\r\n");
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curl_slist_free_all(trailers);
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}
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#endif
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/* if we are transmitting trailing data, we don't need to write
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a chunk size so we skip this */
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if(data->req.upload_chunky &&
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data->state.trailers_state == TRAILERS_NONE) {
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/* if chunked Transfer-Encoding */
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buffersize -= (8 + 2 + 2); /* 32bit hex + CRLF + CRLF */
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data->req.upload_fromhere += (8 + 2); /* 32bit hex + CRLF */
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}
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#ifndef CURL_DISABLE_HTTP
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if(data->state.trailers_state == TRAILERS_SENDING) {
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/* if we're here then that means that we already sent the last empty chunk
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but we didn't send a final CR LF, so we sent 0 CR LF. We then start
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pulling trailing data until we ²have no more at which point we
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simply return to the previous point in the state machine as if
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nothing happened.
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*/
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readfunc = Curl_trailers_read;
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extra_data = (void *)data;
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}
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else
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#endif
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{
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readfunc = data->state.fread_func;
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extra_data = data->state.in;
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}
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Curl_set_in_callback(data, true);
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nread = readfunc(data->req.upload_fromhere, 1,
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buffersize, extra_data);
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Curl_set_in_callback(data, false);
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if(nread == CURL_READFUNC_ABORT) {
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failf(data, "operation aborted by callback");
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*nreadp = 0;
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return CURLE_ABORTED_BY_CALLBACK;
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}
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if(nread == CURL_READFUNC_PAUSE) {
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struct SingleRequest *k = &data->req;
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if(conn->handler->flags & PROTOPT_NONETWORK) {
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/* protocols that work without network cannot be paused. This is
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actually only FILE:// just now, and it can't pause since the transfer
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isn't done using the "normal" procedure. */
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failf(data, "Read callback asked for PAUSE when not supported!");
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return CURLE_READ_ERROR;
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}
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/* CURL_READFUNC_PAUSE pauses read callbacks that feed socket writes */
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k->keepon |= KEEP_SEND_PAUSE; /* mark socket send as paused */
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if(data->req.upload_chunky) {
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/* Back out the preallocation done above */
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data->req.upload_fromhere -= (8 + 2);
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}
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*nreadp = 0;
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return CURLE_OK; /* nothing was read */
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}
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else if(nread > buffersize) {
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/* the read function returned a too large value */
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*nreadp = 0;
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failf(data, "read function returned funny value");
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return CURLE_READ_ERROR;
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}
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if(!data->req.forbidchunk && data->req.upload_chunky) {
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/* if chunked Transfer-Encoding
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* build chunk:
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*
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* <HEX SIZE> CRLF
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* <DATA> CRLF
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*/
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/* On non-ASCII platforms the <DATA> may or may not be
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translated based on set.prefer_ascii while the protocol
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portion must always be translated to the network encoding.
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To further complicate matters, line end conversion might be
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done later on, so we need to prevent CRLFs from becoming
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CRCRLFs if that's the case. To do this we use bare LFs
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here, knowing they'll become CRLFs later on.
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*/
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bool added_crlf = FALSE;
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int hexlen = 0;
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const char *endofline_native;
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const char *endofline_network;
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if(
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#ifdef CURL_DO_LINEEND_CONV
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(data->set.prefer_ascii) ||
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#endif
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(data->set.crlf)) {
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/* \n will become \r\n later on */
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endofline_native = "\n";
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endofline_network = "\x0a";
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}
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else {
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endofline_native = "\r\n";
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endofline_network = "\x0d\x0a";
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}
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/* if we're not handling trailing data, proceed as usual */
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if(data->state.trailers_state != TRAILERS_SENDING) {
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char hexbuffer[11] = "";
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hexlen = msnprintf(hexbuffer, sizeof(hexbuffer),
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"%zx%s", nread, endofline_native);
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/* move buffer pointer */
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data->req.upload_fromhere -= hexlen;
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nread += hexlen;
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/* copy the prefix to the buffer, leaving out the NUL */
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memcpy(data->req.upload_fromhere, hexbuffer, hexlen);
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/* always append ASCII CRLF to the data unless
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we have a valid trailer callback */
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#ifndef CURL_DISABLE_HTTP
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if((nread-hexlen) == 0 &&
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data->set.trailer_callback != NULL &&
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data->state.trailers_state == TRAILERS_NONE) {
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data->state.trailers_state = TRAILERS_INITIALIZED;
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}
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else
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#endif
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{
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memcpy(data->req.upload_fromhere + nread,
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endofline_network,
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strlen(endofline_network));
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added_crlf = TRUE;
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}
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}
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#ifdef CURL_DOES_CONVERSIONS
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{
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CURLcode result;
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size_t length;
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if(data->set.prefer_ascii)
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/* translate the protocol and data */
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length = nread;
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else
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/* just translate the protocol portion */
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length = hexlen;
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if(length) {
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result = Curl_convert_to_network(data, data->req.upload_fromhere,
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length);
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/* Curl_convert_to_network calls failf if unsuccessful */
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if(result)
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return result;
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}
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}
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#endif /* CURL_DOES_CONVERSIONS */
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#ifndef CURL_DISABLE_HTTP
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if(data->state.trailers_state == TRAILERS_SENDING &&
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!Curl_trailers_left(data)) {
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Curl_add_buffer_free(&data->state.trailers_buf);
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data->state.trailers_state = TRAILERS_DONE;
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data->set.trailer_data = NULL;
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data->set.trailer_callback = NULL;
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/* mark the transfer as done */
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data->req.upload_done = TRUE;
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infof(data, "Signaling end of chunked upload after trailers.\n");
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}
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else
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#endif
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if((nread - hexlen) == 0 &&
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data->state.trailers_state != TRAILERS_INITIALIZED) {
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/* mark this as done once this chunk is transferred */
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data->req.upload_done = TRUE;
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infof(data,
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"Signaling end of chunked upload via terminating chunk.\n");
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}
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if(added_crlf)
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nread += strlen(endofline_network); /* for the added end of line */
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}
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#ifdef CURL_DOES_CONVERSIONS
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else if((data->set.prefer_ascii) && (!sending_http_headers)) {
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CURLcode result;
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result = Curl_convert_to_network(data, data->req.upload_fromhere, nread);
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/* Curl_convert_to_network calls failf if unsuccessful */
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if(result)
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return result;
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}
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#endif /* CURL_DOES_CONVERSIONS */
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*nreadp = nread;
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return CURLE_OK;
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}
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/*
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* Curl_readrewind() rewinds the read stream. This is typically used for HTTP
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* POST/PUT with multi-pass authentication when a sending was denied and a
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* resend is necessary.
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*/
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CURLcode Curl_readrewind(struct connectdata *conn)
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{
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struct Curl_easy *data = conn->data;
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curl_mimepart *mimepart = &data->set.mimepost;
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conn->bits.rewindaftersend = FALSE; /* we rewind now */
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/* explicitly switch off sending data on this connection now since we are
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about to restart a new transfer and thus we want to avoid inadvertently
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sending more data on the existing connection until the next transfer
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starts */
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data->req.keepon &= ~KEEP_SEND;
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/* We have sent away data. If not using CURLOPT_POSTFIELDS or
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CURLOPT_HTTPPOST, call app to rewind
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*/
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if(conn->handler->protocol & PROTO_FAMILY_HTTP) {
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struct HTTP *http = data->req.protop;
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if(http->sendit)
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mimepart = http->sendit;
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}
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if(data->set.postfields)
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; /* do nothing */
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else if(data->set.httpreq == HTTPREQ_POST_MIME ||
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data->set.httpreq == HTTPREQ_POST_FORM) {
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if(Curl_mime_rewind(mimepart)) {
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failf(data, "Cannot rewind mime/post data");
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return CURLE_SEND_FAIL_REWIND;
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}
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}
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else {
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if(data->set.seek_func) {
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int err;
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Curl_set_in_callback(data, true);
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err = (data->set.seek_func)(data->set.seek_client, 0, SEEK_SET);
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Curl_set_in_callback(data, false);
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if(err) {
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failf(data, "seek callback returned error %d", (int)err);
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return CURLE_SEND_FAIL_REWIND;
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}
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}
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else if(data->set.ioctl_func) {
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curlioerr err;
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Curl_set_in_callback(data, true);
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err = (data->set.ioctl_func)(data, CURLIOCMD_RESTARTREAD,
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data->set.ioctl_client);
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Curl_set_in_callback(data, false);
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infof(data, "the ioctl callback returned %d\n", (int)err);
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if(err) {
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failf(data, "ioctl callback returned error %d", (int)err);
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return CURLE_SEND_FAIL_REWIND;
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}
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}
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else {
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/* If no CURLOPT_READFUNCTION is used, we know that we operate on a
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given FILE * stream and we can actually attempt to rewind that
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ourselves with fseek() */
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if(data->state.fread_func == (curl_read_callback)fread) {
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if(-1 != fseek(data->state.in, 0, SEEK_SET))
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/* successful rewind */
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return CURLE_OK;
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}
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/* no callback set or failure above, makes us fail at once */
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failf(data, "necessary data rewind wasn't possible");
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return CURLE_SEND_FAIL_REWIND;
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}
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}
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return CURLE_OK;
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}
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static int data_pending(const struct connectdata *conn)
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{
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/* in the case of libssh2, we can never be really sure that we have emptied
|
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its internal buffers so we MUST always try until we get EAGAIN back */
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return conn->handler->protocol&(CURLPROTO_SCP|CURLPROTO_SFTP) ||
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#if defined(USE_NGHTTP2)
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Curl_ssl_data_pending(conn, FIRSTSOCKET) ||
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/* For HTTP/2, we may read up everything including response body
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with header fields in Curl_http_readwrite_headers. If no
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content-length is provided, curl waits for the connection
|
|
close, which we emulate it using conn->proto.httpc.closed =
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TRUE. The thing is if we read everything, then http2_recv won't
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be called and we cannot signal the HTTP/2 stream has closed. As
|
|
a workaround, we return nonzero here to call http2_recv. */
|
|
((conn->handler->protocol&PROTO_FAMILY_HTTP) && conn->httpversion == 20);
|
|
#else
|
|
Curl_ssl_data_pending(conn, FIRSTSOCKET);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Check to see if CURLOPT_TIMECONDITION was met by comparing the time of the
|
|
* remote document with the time provided by CURLOPT_TIMEVAL
|
|
*/
|
|
bool Curl_meets_timecondition(struct Curl_easy *data, time_t timeofdoc)
|
|
{
|
|
if((timeofdoc == 0) || (data->set.timevalue == 0))
|
|
return TRUE;
|
|
|
|
switch(data->set.timecondition) {
|
|
case CURL_TIMECOND_IFMODSINCE:
|
|
default:
|
|
if(timeofdoc <= data->set.timevalue) {
|
|
infof(data,
|
|
"The requested document is not new enough\n");
|
|
data->info.timecond = TRUE;
|
|
return FALSE;
|
|
}
|
|
break;
|
|
case CURL_TIMECOND_IFUNMODSINCE:
|
|
if(timeofdoc >= data->set.timevalue) {
|
|
infof(data,
|
|
"The requested document is not old enough\n");
|
|
data->info.timecond = TRUE;
|
|
return FALSE;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Go ahead and do a read if we have a readable socket or if
|
|
* the stream was rewound (in which case we have data in a
|
|
* buffer)
|
|
*
|
|
* return '*comeback' TRUE if we didn't properly drain the socket so this
|
|
* function should get called again without select() or similar in between!
|
|
*/
|
|
static CURLcode readwrite_data(struct Curl_easy *data,
|
|
struct connectdata *conn,
|
|
struct SingleRequest *k,
|
|
int *didwhat, bool *done,
|
|
bool *comeback)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
ssize_t nread; /* number of bytes read */
|
|
size_t excess = 0; /* excess bytes read */
|
|
bool readmore = FALSE; /* used by RTP to signal for more data */
|
|
int maxloops = 100;
|
|
|
|
*done = FALSE;
|
|
*comeback = FALSE;
|
|
|
|
/* This is where we loop until we have read everything there is to
|
|
read or we get a CURLE_AGAIN */
|
|
do {
|
|
bool is_empty_data = FALSE;
|
|
size_t buffersize = data->set.buffer_size;
|
|
size_t bytestoread = buffersize;
|
|
|
|
if(
|
|
#if defined(USE_NGHTTP2)
|
|
/* For HTTP/2, read data without caring about the content
|
|
length. This is safe because body in HTTP/2 is always
|
|
segmented thanks to its framing layer. Meanwhile, we have to
|
|
call Curl_read to ensure that http2_handle_stream_close is
|
|
called when we read all incoming bytes for a particular
|
|
stream. */
|
|
!((conn->handler->protocol & PROTO_FAMILY_HTTP) &&
|
|
conn->httpversion == 20) &&
|
|
#endif
|
|
k->size != -1 && !k->header) {
|
|
/* make sure we don't read too much */
|
|
curl_off_t totalleft = k->size - k->bytecount;
|
|
if(totalleft < (curl_off_t)bytestoread)
|
|
bytestoread = (size_t)totalleft;
|
|
}
|
|
|
|
if(bytestoread) {
|
|
/* receive data from the network! */
|
|
result = Curl_read(conn, conn->sockfd, k->buf, bytestoread, &nread);
|
|
|
|
/* read would've blocked */
|
|
if(CURLE_AGAIN == result)
|
|
break; /* get out of loop */
|
|
|
|
if(result>0)
|
|
return result;
|
|
}
|
|
else {
|
|
/* read nothing but since we wanted nothing we consider this an OK
|
|
situation to proceed from */
|
|
DEBUGF(infof(data, "readwrite_data: we're done!\n"));
|
|
nread = 0;
|
|
}
|
|
|
|
if((k->bytecount == 0) && (k->writebytecount == 0)) {
|
|
Curl_pgrsTime(data, TIMER_STARTTRANSFER);
|
|
if(k->exp100 > EXP100_SEND_DATA)
|
|
/* set time stamp to compare with when waiting for the 100 */
|
|
k->start100 = Curl_now();
|
|
}
|
|
|
|
*didwhat |= KEEP_RECV;
|
|
/* indicates data of zero size, i.e. empty file */
|
|
is_empty_data = ((nread == 0) && (k->bodywrites == 0)) ? TRUE : FALSE;
|
|
|
|
/* NUL terminate, allowing string ops to be used */
|
|
if(0 < nread || is_empty_data) {
|
|
k->buf[nread] = 0;
|
|
}
|
|
else {
|
|
/* if we receive 0 or less here, the server closed the connection
|
|
and we bail out from this! */
|
|
DEBUGF(infof(data, "nread <= 0, server closed connection, bailing\n"));
|
|
k->keepon &= ~KEEP_RECV;
|
|
break;
|
|
}
|
|
|
|
/* Default buffer to use when we write the buffer, it may be changed
|
|
in the flow below before the actual storing is done. */
|
|
k->str = k->buf;
|
|
|
|
if(conn->handler->readwrite) {
|
|
result = conn->handler->readwrite(data, conn, &nread, &readmore);
|
|
if(result)
|
|
return result;
|
|
if(readmore)
|
|
break;
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_HTTP
|
|
/* Since this is a two-state thing, we check if we are parsing
|
|
headers at the moment or not. */
|
|
if(k->header) {
|
|
/* we are in parse-the-header-mode */
|
|
bool stop_reading = FALSE;
|
|
result = Curl_http_readwrite_headers(data, conn, &nread, &stop_reading);
|
|
if(result)
|
|
return result;
|
|
|
|
if(conn->handler->readwrite &&
|
|
(k->maxdownload <= 0 && nread > 0)) {
|
|
result = conn->handler->readwrite(data, conn, &nread, &readmore);
|
|
if(result)
|
|
return result;
|
|
if(readmore)
|
|
break;
|
|
}
|
|
|
|
if(stop_reading) {
|
|
/* We've stopped dealing with input, get out of the do-while loop */
|
|
|
|
if(nread > 0) {
|
|
infof(data,
|
|
"Excess found:"
|
|
" excess = %zd"
|
|
" url = %s (zero-length body)\n",
|
|
nread, data->state.up.path);
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
|
|
|
|
/* This is not an 'else if' since it may be a rest from the header
|
|
parsing, where the beginning of the buffer is headers and the end
|
|
is non-headers. */
|
|
if(k->str && !k->header && (nread > 0 || is_empty_data)) {
|
|
|
|
if(data->set.opt_no_body) {
|
|
/* data arrives although we want none, bail out */
|
|
streamclose(conn, "ignoring body");
|
|
*done = TRUE;
|
|
return CURLE_WEIRD_SERVER_REPLY;
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(0 == k->bodywrites && !is_empty_data) {
|
|
/* These checks are only made the first time we are about to
|
|
write a piece of the body */
|
|
if(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)) {
|
|
/* HTTP-only checks */
|
|
|
|
if(data->req.newurl) {
|
|
if(conn->bits.close) {
|
|
/* Abort after the headers if "follow Location" is set
|
|
and we're set to close anyway. */
|
|
k->keepon &= ~KEEP_RECV;
|
|
*done = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
/* We have a new url to load, but since we want to be able
|
|
to re-use this connection properly, we read the full
|
|
response in "ignore more" */
|
|
k->ignorebody = TRUE;
|
|
infof(data, "Ignoring the response-body\n");
|
|
}
|
|
if(data->state.resume_from && !k->content_range &&
|
|
(data->set.httpreq == HTTPREQ_GET) &&
|
|
!k->ignorebody) {
|
|
|
|
if(k->size == data->state.resume_from) {
|
|
/* The resume point is at the end of file, consider this fine
|
|
even if it doesn't allow resume from here. */
|
|
infof(data, "The entire document is already downloaded");
|
|
connclose(conn, "already downloaded");
|
|
/* Abort download */
|
|
k->keepon &= ~KEEP_RECV;
|
|
*done = TRUE;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* we wanted to resume a download, although the server doesn't
|
|
* seem to support this and we did this with a GET (if it
|
|
* wasn't a GET we did a POST or PUT resume) */
|
|
failf(data, "HTTP server doesn't seem to support "
|
|
"byte ranges. Cannot resume.");
|
|
return CURLE_RANGE_ERROR;
|
|
}
|
|
|
|
if(data->set.timecondition && !data->state.range) {
|
|
/* A time condition has been set AND no ranges have been
|
|
requested. This seems to be what chapter 13.3.4 of
|
|
RFC 2616 defines to be the correct action for a
|
|
HTTP/1.1 client */
|
|
|
|
if(!Curl_meets_timecondition(data, k->timeofdoc)) {
|
|
*done = TRUE;
|
|
/* We're simulating a http 304 from server so we return
|
|
what should have been returned from the server */
|
|
data->info.httpcode = 304;
|
|
infof(data, "Simulate a HTTP 304 response!\n");
|
|
/* we abort the transfer before it is completed == we ruin the
|
|
re-use ability. Close the connection */
|
|
connclose(conn, "Simulated 304 handling");
|
|
return CURLE_OK;
|
|
}
|
|
} /* we have a time condition */
|
|
|
|
} /* this is HTTP or RTSP */
|
|
} /* this is the first time we write a body part */
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
|
|
k->bodywrites++;
|
|
|
|
/* pass data to the debug function before it gets "dechunked" */
|
|
if(data->set.verbose) {
|
|
if(k->badheader) {
|
|
Curl_debug(data, CURLINFO_DATA_IN, data->state.headerbuff,
|
|
(size_t)k->hbuflen);
|
|
if(k->badheader == HEADER_PARTHEADER)
|
|
Curl_debug(data, CURLINFO_DATA_IN,
|
|
k->str, (size_t)nread);
|
|
}
|
|
else
|
|
Curl_debug(data, CURLINFO_DATA_IN,
|
|
k->str, (size_t)nread);
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(k->chunk) {
|
|
/*
|
|
* Here comes a chunked transfer flying and we need to decode this
|
|
* properly. While the name says read, this function both reads
|
|
* and writes away the data. The returned 'nread' holds the number
|
|
* of actual data it wrote to the client.
|
|
*/
|
|
|
|
CHUNKcode res =
|
|
Curl_httpchunk_read(conn, k->str, nread, &nread);
|
|
|
|
if(CHUNKE_OK < res) {
|
|
if(CHUNKE_WRITE_ERROR == res) {
|
|
failf(data, "Failed writing data");
|
|
return CURLE_WRITE_ERROR;
|
|
}
|
|
failf(data, "%s in chunked-encoding", Curl_chunked_strerror(res));
|
|
return CURLE_RECV_ERROR;
|
|
}
|
|
if(CHUNKE_STOP == res) {
|
|
size_t dataleft;
|
|
/* we're done reading chunks! */
|
|
k->keepon &= ~KEEP_RECV; /* read no more */
|
|
|
|
/* There are now possibly N number of bytes at the end of the
|
|
str buffer that weren't written to the client.
|
|
Push it back to be read on the next pass. */
|
|
|
|
dataleft = conn->chunk.dataleft;
|
|
if(dataleft != 0) {
|
|
infof(conn->data, "Leftovers after chunking: %zu bytes\n",
|
|
dataleft);
|
|
}
|
|
}
|
|
/* If it returned OK, we just keep going */
|
|
}
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
|
|
/* Account for body content stored in the header buffer */
|
|
if((k->badheader == HEADER_PARTHEADER) && !k->ignorebody) {
|
|
DEBUGF(infof(data, "Increasing bytecount by %zu from hbuflen\n",
|
|
k->hbuflen));
|
|
k->bytecount += k->hbuflen;
|
|
}
|
|
|
|
if((-1 != k->maxdownload) &&
|
|
(k->bytecount + nread >= k->maxdownload)) {
|
|
|
|
excess = (size_t)(k->bytecount + nread - k->maxdownload);
|
|
if(excess > 0 && !k->ignorebody) {
|
|
infof(data,
|
|
"Excess found in a read:"
|
|
" excess = %zu"
|
|
", size = %" CURL_FORMAT_CURL_OFF_T
|
|
", maxdownload = %" CURL_FORMAT_CURL_OFF_T
|
|
", bytecount = %" CURL_FORMAT_CURL_OFF_T "\n",
|
|
excess, k->size, k->maxdownload, k->bytecount);
|
|
}
|
|
|
|
nread = (ssize_t) (k->maxdownload - k->bytecount);
|
|
if(nread < 0) /* this should be unusual */
|
|
nread = 0;
|
|
|
|
k->keepon &= ~KEEP_RECV; /* we're done reading */
|
|
}
|
|
|
|
k->bytecount += nread;
|
|
|
|
Curl_pgrsSetDownloadCounter(data, k->bytecount);
|
|
|
|
if(!k->chunk && (nread || k->badheader || is_empty_data)) {
|
|
/* If this is chunky transfer, it was already written */
|
|
|
|
if(k->badheader && !k->ignorebody) {
|
|
/* we parsed a piece of data wrongly assuming it was a header
|
|
and now we output it as body instead */
|
|
|
|
/* Don't let excess data pollute body writes */
|
|
if(k->maxdownload == -1 || (curl_off_t)k->hbuflen <= k->maxdownload)
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY,
|
|
data->state.headerbuff,
|
|
k->hbuflen);
|
|
else
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY,
|
|
data->state.headerbuff,
|
|
(size_t)k->maxdownload);
|
|
|
|
if(result)
|
|
return result;
|
|
}
|
|
if(k->badheader < HEADER_ALLBAD) {
|
|
/* This switch handles various content encodings. If there's an
|
|
error here, be sure to check over the almost identical code
|
|
in http_chunks.c.
|
|
Make sure that ALL_CONTENT_ENCODINGS contains all the
|
|
encodings handled here. */
|
|
if(conn->data->set.http_ce_skip || !k->writer_stack) {
|
|
if(!k->ignorebody) {
|
|
#ifndef CURL_DISABLE_POP3
|
|
if(conn->handler->protocol & PROTO_FAMILY_POP3)
|
|
result = Curl_pop3_write(conn, k->str, nread);
|
|
else
|
|
#endif /* CURL_DISABLE_POP3 */
|
|
result = Curl_client_write(conn, CLIENTWRITE_BODY, k->str,
|
|
nread);
|
|
}
|
|
}
|
|
else if(!k->ignorebody)
|
|
result = Curl_unencode_write(conn, k->writer_stack, k->str, nread);
|
|
}
|
|
k->badheader = HEADER_NORMAL; /* taken care of now */
|
|
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
} /* if(!header and data to read) */
|
|
|
|
if(conn->handler->readwrite && excess && !conn->bits.stream_was_rewound) {
|
|
/* Parse the excess data */
|
|
k->str += nread;
|
|
|
|
if(&k->str[excess] > &k->buf[data->set.buffer_size]) {
|
|
/* the excess amount was too excessive(!), make sure
|
|
it doesn't read out of buffer */
|
|
excess = &k->buf[data->set.buffer_size] - k->str;
|
|
}
|
|
nread = (ssize_t)excess;
|
|
|
|
result = conn->handler->readwrite(data, conn, &nread, &readmore);
|
|
if(result)
|
|
return result;
|
|
|
|
if(readmore)
|
|
k->keepon |= KEEP_RECV; /* we're not done reading */
|
|
break;
|
|
}
|
|
|
|
if(is_empty_data) {
|
|
/* if we received nothing, the server closed the connection and we
|
|
are done */
|
|
k->keepon &= ~KEEP_RECV;
|
|
}
|
|
|
|
if(k->keepon & KEEP_RECV_PAUSE) {
|
|
/* this is a paused transfer */
|
|
break;
|
|
}
|
|
|
|
} while(data_pending(conn) && maxloops--);
|
|
|
|
if(maxloops <= 0) {
|
|
/* we mark it as read-again-please */
|
|
conn->cselect_bits = CURL_CSELECT_IN;
|
|
*comeback = TRUE;
|
|
}
|
|
|
|
if(((k->keepon & (KEEP_RECV|KEEP_SEND)) == KEEP_SEND) &&
|
|
conn->bits.close) {
|
|
/* When we've read the entire thing and the close bit is set, the server
|
|
may now close the connection. If there's now any kind of sending going
|
|
on from our side, we need to stop that immediately. */
|
|
infof(data, "we are done reading and this is set to close, stop send\n");
|
|
k->keepon &= ~KEEP_SEND; /* no writing anymore either */
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode done_sending(struct connectdata *conn,
|
|
struct SingleRequest *k)
|
|
{
|
|
k->keepon &= ~KEEP_SEND; /* we're done writing */
|
|
|
|
Curl_http2_done_sending(conn);
|
|
|
|
if(conn->bits.rewindaftersend) {
|
|
CURLcode result = Curl_readrewind(conn);
|
|
if(result)
|
|
return result;
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#if defined(WIN32) && !defined(USE_LWIPSOCK)
|
|
#ifndef SIO_IDEAL_SEND_BACKLOG_QUERY
|
|
#define SIO_IDEAL_SEND_BACKLOG_QUERY 0x4004747B
|
|
#endif
|
|
|
|
static void win_update_buffer_size(curl_socket_t sockfd)
|
|
{
|
|
int result;
|
|
ULONG ideal;
|
|
DWORD ideallen;
|
|
result = WSAIoctl(sockfd, SIO_IDEAL_SEND_BACKLOG_QUERY, 0, 0,
|
|
&ideal, sizeof(ideal), &ideallen, 0, 0);
|
|
if(result == 0) {
|
|
setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF,
|
|
(const char *)&ideal, sizeof(ideal));
|
|
}
|
|
}
|
|
#else
|
|
#define win_update_buffer_size(x)
|
|
#endif
|
|
|
|
/*
|
|
* Send data to upload to the server, when the socket is writable.
|
|
*/
|
|
static CURLcode readwrite_upload(struct Curl_easy *data,
|
|
struct connectdata *conn,
|
|
int *didwhat)
|
|
{
|
|
ssize_t i, si;
|
|
ssize_t bytes_written;
|
|
CURLcode result;
|
|
ssize_t nread; /* number of bytes read */
|
|
bool sending_http_headers = FALSE;
|
|
struct SingleRequest *k = &data->req;
|
|
|
|
if((k->bytecount == 0) && (k->writebytecount == 0))
|
|
Curl_pgrsTime(data, TIMER_STARTTRANSFER);
|
|
|
|
*didwhat |= KEEP_SEND;
|
|
|
|
do {
|
|
/* only read more data if there's no upload data already
|
|
present in the upload buffer */
|
|
if(0 == k->upload_present) {
|
|
result = Curl_get_upload_buffer(data);
|
|
if(result)
|
|
return result;
|
|
/* init the "upload from here" pointer */
|
|
k->upload_fromhere = data->state.ulbuf;
|
|
|
|
if(!k->upload_done) {
|
|
/* HTTP pollution, this should be written nicer to become more
|
|
protocol agnostic. */
|
|
size_t fillcount;
|
|
struct HTTP *http = k->protop;
|
|
|
|
if((k->exp100 == EXP100_SENDING_REQUEST) &&
|
|
(http->sending == HTTPSEND_BODY)) {
|
|
/* If this call is to send body data, we must take some action:
|
|
We have sent off the full HTTP 1.1 request, and we shall now
|
|
go into the Expect: 100 state and await such a header */
|
|
k->exp100 = EXP100_AWAITING_CONTINUE; /* wait for the header */
|
|
k->keepon &= ~KEEP_SEND; /* disable writing */
|
|
k->start100 = Curl_now(); /* timeout count starts now */
|
|
*didwhat &= ~KEEP_SEND; /* we didn't write anything actually */
|
|
/* set a timeout for the multi interface */
|
|
Curl_expire(data, data->set.expect_100_timeout, EXPIRE_100_TIMEOUT);
|
|
break;
|
|
}
|
|
|
|
if(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)) {
|
|
if(http->sending == HTTPSEND_REQUEST)
|
|
/* We're sending the HTTP request headers, not the data.
|
|
Remember that so we don't change the line endings. */
|
|
sending_http_headers = TRUE;
|
|
else
|
|
sending_http_headers = FALSE;
|
|
}
|
|
|
|
result = Curl_fillreadbuffer(conn, data->set.upload_buffer_size,
|
|
&fillcount);
|
|
if(result)
|
|
return result;
|
|
|
|
nread = fillcount;
|
|
}
|
|
else
|
|
nread = 0; /* we're done uploading/reading */
|
|
|
|
if(!nread && (k->keepon & KEEP_SEND_PAUSE)) {
|
|
/* this is a paused transfer */
|
|
break;
|
|
}
|
|
if(nread <= 0) {
|
|
result = done_sending(conn, k);
|
|
if(result)
|
|
return result;
|
|
break;
|
|
}
|
|
|
|
/* store number of bytes available for upload */
|
|
k->upload_present = nread;
|
|
|
|
/* convert LF to CRLF if so asked */
|
|
if((!sending_http_headers) && (
|
|
#ifdef CURL_DO_LINEEND_CONV
|
|
/* always convert if we're FTPing in ASCII mode */
|
|
(data->set.prefer_ascii) ||
|
|
#endif
|
|
(data->set.crlf))) {
|
|
/* Do we need to allocate a scratch buffer? */
|
|
if(!data->state.scratch) {
|
|
data->state.scratch = malloc(2 * data->set.upload_buffer_size);
|
|
if(!data->state.scratch) {
|
|
failf(data, "Failed to alloc scratch buffer!");
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ASCII/EBCDIC Note: This is presumably a text (not binary)
|
|
* transfer so the data should already be in ASCII.
|
|
* That means the hex values for ASCII CR (0x0d) & LF (0x0a)
|
|
* must be used instead of the escape sequences \r & \n.
|
|
*/
|
|
for(i = 0, si = 0; i < nread; i++, si++) {
|
|
if(k->upload_fromhere[i] == 0x0a) {
|
|
data->state.scratch[si++] = 0x0d;
|
|
data->state.scratch[si] = 0x0a;
|
|
if(!data->set.crlf) {
|
|
/* we're here only because FTP is in ASCII mode...
|
|
bump infilesize for the LF we just added */
|
|
if(data->state.infilesize != -1)
|
|
data->state.infilesize++;
|
|
}
|
|
}
|
|
else
|
|
data->state.scratch[si] = k->upload_fromhere[i];
|
|
}
|
|
|
|
if(si != nread) {
|
|
/* only perform the special operation if we really did replace
|
|
anything */
|
|
nread = si;
|
|
|
|
/* upload from the new (replaced) buffer instead */
|
|
k->upload_fromhere = data->state.scratch;
|
|
|
|
/* set the new amount too */
|
|
k->upload_present = nread;
|
|
}
|
|
}
|
|
|
|
#ifndef CURL_DISABLE_SMTP
|
|
if(conn->handler->protocol & PROTO_FAMILY_SMTP) {
|
|
result = Curl_smtp_escape_eob(conn, nread);
|
|
if(result)
|
|
return result;
|
|
}
|
|
#endif /* CURL_DISABLE_SMTP */
|
|
} /* if 0 == k->upload_present */
|
|
else {
|
|
/* We have a partial buffer left from a previous "round". Use
|
|
that instead of reading more data */
|
|
}
|
|
|
|
/* write to socket (send away data) */
|
|
result = Curl_write(conn,
|
|
conn->writesockfd, /* socket to send to */
|
|
k->upload_fromhere, /* buffer pointer */
|
|
k->upload_present, /* buffer size */
|
|
&bytes_written); /* actually sent */
|
|
if(result)
|
|
return result;
|
|
|
|
win_update_buffer_size(conn->writesockfd);
|
|
|
|
if(data->set.verbose)
|
|
/* show the data before we change the pointer upload_fromhere */
|
|
Curl_debug(data, CURLINFO_DATA_OUT, k->upload_fromhere,
|
|
(size_t)bytes_written);
|
|
|
|
k->writebytecount += bytes_written;
|
|
Curl_pgrsSetUploadCounter(data, k->writebytecount);
|
|
|
|
if((!k->upload_chunky || k->forbidchunk) &&
|
|
(k->writebytecount == data->state.infilesize)) {
|
|
/* we have sent all data we were supposed to */
|
|
k->upload_done = TRUE;
|
|
infof(data, "We are completely uploaded and fine\n");
|
|
}
|
|
|
|
if(k->upload_present != bytes_written) {
|
|
/* we only wrote a part of the buffer (if anything), deal with it! */
|
|
|
|
/* store the amount of bytes left in the buffer to write */
|
|
k->upload_present -= bytes_written;
|
|
|
|
/* advance the pointer where to find the buffer when the next send
|
|
is to happen */
|
|
k->upload_fromhere += bytes_written;
|
|
}
|
|
else {
|
|
/* we've uploaded that buffer now */
|
|
result = Curl_get_upload_buffer(data);
|
|
if(result)
|
|
return result;
|
|
k->upload_fromhere = data->state.ulbuf;
|
|
k->upload_present = 0; /* no more bytes left */
|
|
|
|
if(k->upload_done) {
|
|
result = done_sending(conn, k);
|
|
if(result)
|
|
return result;
|
|
}
|
|
}
|
|
|
|
|
|
} WHILE_FALSE; /* just to break out from! */
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Curl_readwrite() is the low-level function to be called when data is to
|
|
* be read and written to/from the connection.
|
|
*
|
|
* return '*comeback' TRUE if we didn't properly drain the socket so this
|
|
* function should get called again without select() or similar in between!
|
|
*/
|
|
CURLcode Curl_readwrite(struct connectdata *conn,
|
|
struct Curl_easy *data,
|
|
bool *done,
|
|
bool *comeback)
|
|
{
|
|
struct SingleRequest *k = &data->req;
|
|
CURLcode result;
|
|
int didwhat = 0;
|
|
|
|
curl_socket_t fd_read;
|
|
curl_socket_t fd_write;
|
|
int select_res = conn->cselect_bits;
|
|
|
|
conn->cselect_bits = 0;
|
|
|
|
/* only use the proper socket if the *_HOLD bit is not set simultaneously as
|
|
then we are in rate limiting state in that transfer direction */
|
|
|
|
if((k->keepon & KEEP_RECVBITS) == KEEP_RECV)
|
|
fd_read = conn->sockfd;
|
|
else
|
|
fd_read = CURL_SOCKET_BAD;
|
|
|
|
if((k->keepon & KEEP_SENDBITS) == KEEP_SEND)
|
|
fd_write = conn->writesockfd;
|
|
else
|
|
fd_write = CURL_SOCKET_BAD;
|
|
|
|
if(conn->data->state.drain) {
|
|
select_res |= CURL_CSELECT_IN;
|
|
DEBUGF(infof(data, "Curl_readwrite: forcibly told to drain data\n"));
|
|
}
|
|
|
|
if(!select_res) /* Call for select()/poll() only, if read/write/error
|
|
status is not known. */
|
|
select_res = Curl_socket_check(fd_read, CURL_SOCKET_BAD, fd_write, 0);
|
|
|
|
if(select_res == CURL_CSELECT_ERR) {
|
|
failf(data, "select/poll returned error");
|
|
return CURLE_SEND_ERROR;
|
|
}
|
|
|
|
/* We go ahead and do a read if we have a readable socket or if
|
|
the stream was rewound (in which case we have data in a
|
|
buffer) */
|
|
if((k->keepon & KEEP_RECV) &&
|
|
((select_res & CURL_CSELECT_IN) || conn->bits.stream_was_rewound)) {
|
|
|
|
result = readwrite_data(data, conn, k, &didwhat, done, comeback);
|
|
if(result || *done)
|
|
return result;
|
|
}
|
|
|
|
/* If we still have writing to do, we check if we have a writable socket. */
|
|
if((k->keepon & KEEP_SEND) && (select_res & CURL_CSELECT_OUT)) {
|
|
/* write */
|
|
|
|
result = readwrite_upload(data, conn, &didwhat);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
k->now = Curl_now();
|
|
if(didwhat) {
|
|
;
|
|
}
|
|
else {
|
|
/* no read no write, this is a timeout? */
|
|
if(k->exp100 == EXP100_AWAITING_CONTINUE) {
|
|
/* This should allow some time for the header to arrive, but only a
|
|
very short time as otherwise it'll be too much wasted time too
|
|
often. */
|
|
|
|
/* Quoting RFC2616, section "8.2.3 Use of the 100 (Continue) Status":
|
|
|
|
Therefore, when a client sends this header field to an origin server
|
|
(possibly via a proxy) from which it has never seen a 100 (Continue)
|
|
status, the client SHOULD NOT wait for an indefinite period before
|
|
sending the request body.
|
|
|
|
*/
|
|
|
|
timediff_t ms = Curl_timediff(k->now, k->start100);
|
|
if(ms >= data->set.expect_100_timeout) {
|
|
/* we've waited long enough, continue anyway */
|
|
k->exp100 = EXP100_SEND_DATA;
|
|
k->keepon |= KEEP_SEND;
|
|
Curl_expire_done(data, EXPIRE_100_TIMEOUT);
|
|
infof(data, "Done waiting for 100-continue\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
if(Curl_pgrsUpdate(conn))
|
|
result = CURLE_ABORTED_BY_CALLBACK;
|
|
else
|
|
result = Curl_speedcheck(data, k->now);
|
|
if(result)
|
|
return result;
|
|
|
|
if(k->keepon) {
|
|
if(0 > Curl_timeleft(data, &k->now, FALSE)) {
|
|
if(k->size != -1) {
|
|
failf(data, "Operation timed out after %" CURL_FORMAT_TIMEDIFF_T
|
|
" milliseconds with %" CURL_FORMAT_CURL_OFF_T " out of %"
|
|
CURL_FORMAT_CURL_OFF_T " bytes received",
|
|
Curl_timediff(k->now, data->progress.t_startsingle),
|
|
k->bytecount, k->size);
|
|
}
|
|
else {
|
|
failf(data, "Operation timed out after %" CURL_FORMAT_TIMEDIFF_T
|
|
" milliseconds with %" CURL_FORMAT_CURL_OFF_T " bytes received",
|
|
Curl_timediff(k->now, data->progress.t_startsingle),
|
|
k->bytecount);
|
|
}
|
|
return CURLE_OPERATION_TIMEDOUT;
|
|
}
|
|
}
|
|
else {
|
|
/*
|
|
* The transfer has been performed. Just make some general checks before
|
|
* returning.
|
|
*/
|
|
|
|
if(!(data->set.opt_no_body) && (k->size != -1) &&
|
|
(k->bytecount != k->size) &&
|
|
#ifdef CURL_DO_LINEEND_CONV
|
|
/* Most FTP servers don't adjust their file SIZE response for CRLFs,
|
|
so we'll check to see if the discrepancy can be explained
|
|
by the number of CRLFs we've changed to LFs.
|
|
*/
|
|
(k->bytecount != (k->size + data->state.crlf_conversions)) &&
|
|
#endif /* CURL_DO_LINEEND_CONV */
|
|
!k->newurl) {
|
|
failf(data, "transfer closed with %" CURL_FORMAT_CURL_OFF_T
|
|
" bytes remaining to read", k->size - k->bytecount);
|
|
return CURLE_PARTIAL_FILE;
|
|
}
|
|
if(!(data->set.opt_no_body) && k->chunk &&
|
|
(conn->chunk.state != CHUNK_STOP)) {
|
|
/*
|
|
* In chunked mode, return an error if the connection is closed prior to
|
|
* the empty (terminating) chunk is read.
|
|
*
|
|
* The condition above used to check for
|
|
* conn->proto.http->chunk.datasize != 0 which is true after reading
|
|
* *any* chunk, not just the empty chunk.
|
|
*
|
|
*/
|
|
failf(data, "transfer closed with outstanding read data remaining");
|
|
return CURLE_PARTIAL_FILE;
|
|
}
|
|
if(Curl_pgrsUpdate(conn))
|
|
return CURLE_ABORTED_BY_CALLBACK;
|
|
}
|
|
|
|
/* Now update the "done" boolean we return */
|
|
*done = (0 == (k->keepon&(KEEP_RECV|KEEP_SEND|
|
|
KEEP_RECV_PAUSE|KEEP_SEND_PAUSE))) ? TRUE : FALSE;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Curl_single_getsock() gets called by the multi interface code when the app
|
|
* has requested to get the sockets for the current connection. This function
|
|
* will then be called once for every connection that the multi interface
|
|
* keeps track of. This function will only be called for connections that are
|
|
* in the proper state to have this information available.
|
|
*/
|
|
int Curl_single_getsock(const struct connectdata *conn,
|
|
curl_socket_t *sock, /* points to numsocks number
|
|
of sockets */
|
|
int numsocks)
|
|
{
|
|
const struct Curl_easy *data = conn->data;
|
|
int bitmap = GETSOCK_BLANK;
|
|
unsigned sockindex = 0;
|
|
|
|
if(conn->handler->perform_getsock)
|
|
return conn->handler->perform_getsock(conn, sock, numsocks);
|
|
|
|
if(numsocks < 2)
|
|
/* simple check but we might need two slots */
|
|
return GETSOCK_BLANK;
|
|
|
|
/* don't include HOLD and PAUSE connections */
|
|
if((data->req.keepon & KEEP_RECVBITS) == KEEP_RECV) {
|
|
|
|
DEBUGASSERT(conn->sockfd != CURL_SOCKET_BAD);
|
|
|
|
bitmap |= GETSOCK_READSOCK(sockindex);
|
|
sock[sockindex] = conn->sockfd;
|
|
}
|
|
|
|
/* don't include HOLD and PAUSE connections */
|
|
if((data->req.keepon & KEEP_SENDBITS) == KEEP_SEND) {
|
|
|
|
if((conn->sockfd != conn->writesockfd) ||
|
|
bitmap == GETSOCK_BLANK) {
|
|
/* only if they are not the same socket and we have a readable
|
|
one, we increase index */
|
|
if(bitmap != GETSOCK_BLANK)
|
|
sockindex++; /* increase index if we need two entries */
|
|
|
|
DEBUGASSERT(conn->writesockfd != CURL_SOCKET_BAD);
|
|
|
|
sock[sockindex] = conn->writesockfd;
|
|
}
|
|
|
|
bitmap |= GETSOCK_WRITESOCK(sockindex);
|
|
}
|
|
|
|
return bitmap;
|
|
}
|
|
|
|
/* Curl_init_CONNECT() gets called each time the handle switches to CONNECT
|
|
which means this gets called once for each subsequent redirect etc */
|
|
void Curl_init_CONNECT(struct Curl_easy *data)
|
|
{
|
|
data->state.fread_func = data->set.fread_func_set;
|
|
data->state.in = data->set.in_set;
|
|
}
|
|
|
|
/*
|
|
* Curl_pretransfer() is called immediately before a transfer starts, and only
|
|
* once for one transfer no matter if it has redirects or do multi-pass
|
|
* authentication etc.
|
|
*/
|
|
CURLcode Curl_pretransfer(struct Curl_easy *data)
|
|
{
|
|
CURLcode result;
|
|
|
|
if(!data->change.url && !data->set.uh) {
|
|
/* we can't do anything without URL */
|
|
failf(data, "No URL set!");
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
|
|
/* since the URL may have been redirected in a previous use of this handle */
|
|
if(data->change.url_alloc) {
|
|
/* the already set URL is allocated, free it first! */
|
|
Curl_safefree(data->change.url);
|
|
data->change.url_alloc = FALSE;
|
|
}
|
|
|
|
if(!data->change.url && data->set.uh) {
|
|
CURLUcode uc;
|
|
uc = curl_url_get(data->set.uh,
|
|
CURLUPART_URL, &data->set.str[STRING_SET_URL], 0);
|
|
if(uc) {
|
|
failf(data, "No URL set!");
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
}
|
|
|
|
data->change.url = data->set.str[STRING_SET_URL];
|
|
|
|
/* Init the SSL session ID cache here. We do it here since we want to do it
|
|
after the *_setopt() calls (that could specify the size of the cache) but
|
|
before any transfer takes place. */
|
|
result = Curl_ssl_initsessions(data, data->set.general_ssl.max_ssl_sessions);
|
|
if(result)
|
|
return result;
|
|
|
|
data->state.wildcardmatch = data->set.wildcard_enabled;
|
|
data->set.followlocation = 0; /* reset the location-follow counter */
|
|
data->state.this_is_a_follow = FALSE; /* reset this */
|
|
data->state.errorbuf = FALSE; /* no error has occurred */
|
|
data->state.httpversion = 0; /* don't assume any particular server version */
|
|
|
|
data->state.authproblem = FALSE;
|
|
data->state.authhost.want = data->set.httpauth;
|
|
data->state.authproxy.want = data->set.proxyauth;
|
|
Curl_safefree(data->info.wouldredirect);
|
|
data->info.wouldredirect = NULL;
|
|
|
|
if(data->set.httpreq == HTTPREQ_PUT)
|
|
data->state.infilesize = data->set.filesize;
|
|
else if((data->set.httpreq != HTTPREQ_GET) &&
|
|
(data->set.httpreq != HTTPREQ_HEAD)) {
|
|
data->state.infilesize = data->set.postfieldsize;
|
|
if(data->set.postfields && (data->state.infilesize == -1))
|
|
data->state.infilesize = (curl_off_t)strlen(data->set.postfields);
|
|
}
|
|
else
|
|
data->state.infilesize = 0;
|
|
|
|
/* If there is a list of cookie files to read, do it now! */
|
|
if(data->change.cookielist)
|
|
Curl_cookie_loadfiles(data);
|
|
|
|
/* If there is a list of host pairs to deal with */
|
|
if(data->change.resolve)
|
|
result = Curl_loadhostpairs(data);
|
|
|
|
if(!result) {
|
|
/* Allow data->set.use_port to set which port to use. This needs to be
|
|
* disabled for example when we follow Location: headers to URLs using
|
|
* different ports! */
|
|
data->state.allow_port = TRUE;
|
|
|
|
#if defined(HAVE_SIGNAL) && defined(SIGPIPE) && !defined(HAVE_MSG_NOSIGNAL)
|
|
/*************************************************************
|
|
* Tell signal handler to ignore SIGPIPE
|
|
*************************************************************/
|
|
if(!data->set.no_signal)
|
|
data->state.prev_signal = signal(SIGPIPE, SIG_IGN);
|
|
#endif
|
|
|
|
Curl_initinfo(data); /* reset session-specific information "variables" */
|
|
Curl_pgrsResetTransferSizes(data);
|
|
Curl_pgrsStartNow(data);
|
|
|
|
/* In case the handle is re-used and an authentication method was picked
|
|
in the session we need to make sure we only use the one(s) we now
|
|
consider to be fine */
|
|
data->state.authhost.picked &= data->state.authhost.want;
|
|
data->state.authproxy.picked &= data->state.authproxy.want;
|
|
|
|
#ifndef CURL_DISABLE_FTP
|
|
if(data->state.wildcardmatch) {
|
|
struct WildcardData *wc = &data->wildcard;
|
|
if(wc->state < CURLWC_INIT) {
|
|
result = Curl_wildcard_init(wc); /* init wildcard structures */
|
|
if(result)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Curl_posttransfer() is called immediately after a transfer ends
|
|
*/
|
|
CURLcode Curl_posttransfer(struct Curl_easy *data)
|
|
{
|
|
#if defined(HAVE_SIGNAL) && defined(SIGPIPE) && !defined(HAVE_MSG_NOSIGNAL)
|
|
/* restore the signal handler for SIGPIPE before we get back */
|
|
if(!data->set.no_signal)
|
|
signal(SIGPIPE, data->state.prev_signal);
|
|
#else
|
|
(void)data; /* unused parameter */
|
|
#endif
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Curl_follow() handles the URL redirect magic. Pass in the 'newurl' string
|
|
* as given by the remote server and set up the new URL to request.
|
|
*
|
|
* This function DOES NOT FREE the given url.
|
|
*/
|
|
CURLcode Curl_follow(struct Curl_easy *data,
|
|
char *newurl, /* the Location: string */
|
|
followtype type) /* see transfer.h */
|
|
{
|
|
#ifdef CURL_DISABLE_HTTP
|
|
(void)data;
|
|
(void)newurl;
|
|
(void)type;
|
|
/* Location: following will not happen when HTTP is disabled */
|
|
return CURLE_TOO_MANY_REDIRECTS;
|
|
#else
|
|
|
|
/* Location: redirect */
|
|
bool disallowport = FALSE;
|
|
bool reachedmax = FALSE;
|
|
CURLUcode uc;
|
|
|
|
if(type == FOLLOW_REDIR) {
|
|
if((data->set.maxredirs != -1) &&
|
|
(data->set.followlocation >= data->set.maxredirs)) {
|
|
reachedmax = TRUE;
|
|
type = FOLLOW_FAKE; /* switch to fake to store the would-be-redirected
|
|
to URL */
|
|
}
|
|
else {
|
|
/* mark the next request as a followed location: */
|
|
data->state.this_is_a_follow = TRUE;
|
|
|
|
data->set.followlocation++; /* count location-followers */
|
|
|
|
if(data->set.http_auto_referer) {
|
|
/* We are asked to automatically set the previous URL as the referer
|
|
when we get the next URL. We pick the ->url field, which may or may
|
|
not be 100% correct */
|
|
|
|
if(data->change.referer_alloc) {
|
|
Curl_safefree(data->change.referer);
|
|
data->change.referer_alloc = FALSE;
|
|
}
|
|
|
|
data->change.referer = strdup(data->change.url);
|
|
if(!data->change.referer)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
data->change.referer_alloc = TRUE; /* yes, free this later */
|
|
}
|
|
}
|
|
}
|
|
|
|
if(Curl_is_absolute_url(newurl, NULL, MAX_SCHEME_LEN))
|
|
/* This is an absolute URL, don't allow the custom port number */
|
|
disallowport = TRUE;
|
|
|
|
DEBUGASSERT(data->state.uh);
|
|
uc = curl_url_set(data->state.uh, CURLUPART_URL, newurl,
|
|
(type == FOLLOW_FAKE) ? CURLU_NON_SUPPORT_SCHEME : 0);
|
|
if(uc) {
|
|
if(type != FOLLOW_FAKE)
|
|
return Curl_uc_to_curlcode(uc);
|
|
|
|
/* the URL could not be parsed for some reason, but since this is FAKE
|
|
mode, just duplicate the field as-is */
|
|
newurl = strdup(newurl);
|
|
if(!newurl)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
else {
|
|
|
|
uc = curl_url_get(data->state.uh, CURLUPART_URL, &newurl, 0);
|
|
if(uc)
|
|
return Curl_uc_to_curlcode(uc);
|
|
}
|
|
|
|
if(type == FOLLOW_FAKE) {
|
|
/* we're only figuring out the new url if we would've followed locations
|
|
but now we're done so we can get out! */
|
|
data->info.wouldredirect = newurl;
|
|
|
|
if(reachedmax) {
|
|
failf(data, "Maximum (%ld) redirects followed", data->set.maxredirs);
|
|
return CURLE_TOO_MANY_REDIRECTS;
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
if(disallowport)
|
|
data->state.allow_port = FALSE;
|
|
|
|
if(data->change.url_alloc)
|
|
Curl_safefree(data->change.url);
|
|
|
|
data->change.url = newurl;
|
|
data->change.url_alloc = TRUE;
|
|
|
|
infof(data, "Issue another request to this URL: '%s'\n", data->change.url);
|
|
|
|
/*
|
|
* We get here when the HTTP code is 300-399 (and 401). We need to perform
|
|
* differently based on exactly what return code there was.
|
|
*
|
|
* News from 7.10.6: we can also get here on a 401 or 407, in case we act on
|
|
* a HTTP (proxy-) authentication scheme other than Basic.
|
|
*/
|
|
switch(data->info.httpcode) {
|
|
/* 401 - Act on a WWW-Authenticate, we keep on moving and do the
|
|
Authorization: XXXX header in the HTTP request code snippet */
|
|
/* 407 - Act on a Proxy-Authenticate, we keep on moving and do the
|
|
Proxy-Authorization: XXXX header in the HTTP request code snippet */
|
|
/* 300 - Multiple Choices */
|
|
/* 306 - Not used */
|
|
/* 307 - Temporary Redirect */
|
|
default: /* for all above (and the unknown ones) */
|
|
/* Some codes are explicitly mentioned since I've checked RFC2616 and they
|
|
* seem to be OK to POST to.
|
|
*/
|
|
break;
|
|
case 301: /* Moved Permanently */
|
|
/* (quote from RFC7231, section 6.4.2)
|
|
*
|
|
* Note: For historical reasons, a user agent MAY change the request
|
|
* method from POST to GET for the subsequent request. If this
|
|
* behavior is undesired, the 307 (Temporary Redirect) status code
|
|
* can be used instead.
|
|
*
|
|
* ----
|
|
*
|
|
* Many webservers expect this, so these servers often answers to a POST
|
|
* request with an error page. To be sure that libcurl gets the page that
|
|
* most user agents would get, libcurl has to force GET.
|
|
*
|
|
* This behaviour is forbidden by RFC1945 and the obsolete RFC2616, and
|
|
* can be overridden with CURLOPT_POSTREDIR.
|
|
*/
|
|
if((data->set.httpreq == HTTPREQ_POST
|
|
|| data->set.httpreq == HTTPREQ_POST_FORM
|
|
|| data->set.httpreq == HTTPREQ_POST_MIME)
|
|
&& !(data->set.keep_post & CURL_REDIR_POST_301)) {
|
|
infof(data, "Switch from POST to GET\n");
|
|
data->set.httpreq = HTTPREQ_GET;
|
|
}
|
|
break;
|
|
case 302: /* Found */
|
|
/* (quote from RFC7231, section 6.4.3)
|
|
*
|
|
* Note: For historical reasons, a user agent MAY change the request
|
|
* method from POST to GET for the subsequent request. If this
|
|
* behavior is undesired, the 307 (Temporary Redirect) status code
|
|
* can be used instead.
|
|
*
|
|
* ----
|
|
*
|
|
* Many webservers expect this, so these servers often answers to a POST
|
|
* request with an error page. To be sure that libcurl gets the page that
|
|
* most user agents would get, libcurl has to force GET.
|
|
*
|
|
* This behaviour is forbidden by RFC1945 and the obsolete RFC2616, and
|
|
* can be overridden with CURLOPT_POSTREDIR.
|
|
*/
|
|
if((data->set.httpreq == HTTPREQ_POST
|
|
|| data->set.httpreq == HTTPREQ_POST_FORM
|
|
|| data->set.httpreq == HTTPREQ_POST_MIME)
|
|
&& !(data->set.keep_post & CURL_REDIR_POST_302)) {
|
|
infof(data, "Switch from POST to GET\n");
|
|
data->set.httpreq = HTTPREQ_GET;
|
|
}
|
|
break;
|
|
|
|
case 303: /* See Other */
|
|
/* Disable both types of POSTs, unless the user explicitly
|
|
asks for POST after POST */
|
|
if(data->set.httpreq != HTTPREQ_GET
|
|
&& !(data->set.keep_post & CURL_REDIR_POST_303)) {
|
|
data->set.httpreq = HTTPREQ_GET; /* enforce GET request */
|
|
infof(data, "Disables POST, goes with %s\n",
|
|
data->set.opt_no_body?"HEAD":"GET");
|
|
}
|
|
break;
|
|
case 304: /* Not Modified */
|
|
/* 304 means we did a conditional request and it was "Not modified".
|
|
* We shouldn't get any Location: header in this response!
|
|
*/
|
|
break;
|
|
case 305: /* Use Proxy */
|
|
/* (quote from RFC2616, section 10.3.6):
|
|
* "The requested resource MUST be accessed through the proxy given
|
|
* by the Location field. The Location field gives the URI of the
|
|
* proxy. The recipient is expected to repeat this single request
|
|
* via the proxy. 305 responses MUST only be generated by origin
|
|
* servers."
|
|
*/
|
|
break;
|
|
}
|
|
Curl_pgrsTime(data, TIMER_REDIRECT);
|
|
Curl_pgrsResetTransferSizes(data);
|
|
|
|
return CURLE_OK;
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
}
|
|
|
|
/* Returns CURLE_OK *and* sets '*url' if a request retry is wanted.
|
|
|
|
NOTE: that the *url is malloc()ed. */
|
|
CURLcode Curl_retry_request(struct connectdata *conn,
|
|
char **url)
|
|
{
|
|
struct Curl_easy *data = conn->data;
|
|
bool retry = FALSE;
|
|
*url = NULL;
|
|
|
|
/* if we're talking upload, we can't do the checks below, unless the protocol
|
|
is HTTP as when uploading over HTTP we will still get a response */
|
|
if(data->set.upload &&
|
|
!(conn->handler->protocol&(PROTO_FAMILY_HTTP|CURLPROTO_RTSP)))
|
|
return CURLE_OK;
|
|
|
|
if((data->req.bytecount + data->req.headerbytecount == 0) &&
|
|
conn->bits.reuse &&
|
|
(!data->set.opt_no_body
|
|
|| (conn->handler->protocol & PROTO_FAMILY_HTTP)) &&
|
|
(data->set.rtspreq != RTSPREQ_RECEIVE))
|
|
/* We got no data, we attempted to re-use a connection. For HTTP this
|
|
can be a retry so we try again regardless if we expected a body.
|
|
For other protocols we only try again only if we expected a body.
|
|
|
|
This might happen if the connection was left alive when we were
|
|
done using it before, but that was closed when we wanted to read from
|
|
it again. Bad luck. Retry the same request on a fresh connect! */
|
|
retry = TRUE;
|
|
else if(data->state.refused_stream &&
|
|
(data->req.bytecount + data->req.headerbytecount == 0) ) {
|
|
/* This was sent on a refused stream, safe to rerun. A refused stream
|
|
error can typically only happen on HTTP/2 level if the stream is safe
|
|
to issue again, but the nghttp2 API can deliver the message to other
|
|
streams as well, which is why this adds the check the data counters
|
|
too. */
|
|
infof(conn->data, "REFUSED_STREAM, retrying a fresh connect\n");
|
|
data->state.refused_stream = FALSE; /* clear again */
|
|
retry = TRUE;
|
|
}
|
|
if(retry) {
|
|
infof(conn->data, "Connection died, retrying a fresh connect\n");
|
|
*url = strdup(conn->data->change.url);
|
|
if(!*url)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
connclose(conn, "retry"); /* close this connection */
|
|
conn->bits.retry = TRUE; /* mark this as a connection we're about
|
|
to retry. Marking it this way should
|
|
prevent i.e HTTP transfers to return
|
|
error just because nothing has been
|
|
transferred! */
|
|
|
|
|
|
if(conn->handler->protocol&PROTO_FAMILY_HTTP) {
|
|
if(data->req.writebytecount) {
|
|
CURLcode result = Curl_readrewind(conn);
|
|
if(result) {
|
|
Curl_safefree(*url);
|
|
return result;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* Curl_setup_transfer() is called to setup some basic properties for the
|
|
* upcoming transfer.
|
|
*/
|
|
void
|
|
Curl_setup_transfer(
|
|
struct Curl_easy *data, /* transfer */
|
|
int sockindex, /* socket index to read from or -1 */
|
|
curl_off_t size, /* -1 if unknown at this point */
|
|
bool getheader, /* TRUE if header parsing is wanted */
|
|
int writesockindex /* socket index to write to, it may very well be
|
|
the same we read from. -1 disables */
|
|
)
|
|
{
|
|
struct SingleRequest *k = &data->req;
|
|
struct connectdata *conn = data->conn;
|
|
DEBUGASSERT(conn != NULL);
|
|
DEBUGASSERT((sockindex <= 1) && (sockindex >= -1));
|
|
|
|
if(conn->bits.multiplex || conn->httpversion == 20) {
|
|
/* when multiplexing, the read/write sockets need to be the same! */
|
|
conn->sockfd = sockindex == -1 ?
|
|
((writesockindex == -1 ? CURL_SOCKET_BAD : conn->sock[writesockindex])) :
|
|
conn->sock[sockindex];
|
|
conn->writesockfd = conn->sockfd;
|
|
}
|
|
else {
|
|
conn->sockfd = sockindex == -1 ?
|
|
CURL_SOCKET_BAD : conn->sock[sockindex];
|
|
conn->writesockfd = writesockindex == -1 ?
|
|
CURL_SOCKET_BAD:conn->sock[writesockindex];
|
|
}
|
|
k->getheader = getheader;
|
|
|
|
k->size = size;
|
|
|
|
/* The code sequence below is placed in this function just because all
|
|
necessary input is not always known in do_complete() as this function may
|
|
be called after that */
|
|
|
|
if(!k->getheader) {
|
|
k->header = FALSE;
|
|
if(size > 0)
|
|
Curl_pgrsSetDownloadSize(data, size);
|
|
}
|
|
/* we want header and/or body, if neither then don't do this! */
|
|
if(k->getheader || !data->set.opt_no_body) {
|
|
|
|
if(sockindex != -1)
|
|
k->keepon |= KEEP_RECV;
|
|
|
|
if(writesockindex != -1) {
|
|
struct HTTP *http = data->req.protop;
|
|
/* HTTP 1.1 magic:
|
|
|
|
Even if we require a 100-return code before uploading data, we might
|
|
need to write data before that since the REQUEST may not have been
|
|
finished sent off just yet.
|
|
|
|
Thus, we must check if the request has been sent before we set the
|
|
state info where we wait for the 100-return code
|
|
*/
|
|
if((data->state.expect100header) &&
|
|
(conn->handler->protocol&PROTO_FAMILY_HTTP) &&
|
|
(http->sending == HTTPSEND_BODY)) {
|
|
/* wait with write until we either got 100-continue or a timeout */
|
|
k->exp100 = EXP100_AWAITING_CONTINUE;
|
|
k->start100 = Curl_now();
|
|
|
|
/* Set a timeout for the multi interface. Add the inaccuracy margin so
|
|
that we don't fire slightly too early and get denied to run. */
|
|
Curl_expire(data, data->set.expect_100_timeout, EXPIRE_100_TIMEOUT);
|
|
}
|
|
else {
|
|
if(data->state.expect100header)
|
|
/* when we've sent off the rest of the headers, we must await a
|
|
100-continue but first finish sending the request */
|
|
k->exp100 = EXP100_SENDING_REQUEST;
|
|
|
|
/* enable the write bit when we're not waiting for continue */
|
|
k->keepon |= KEEP_SEND;
|
|
}
|
|
} /* if(writesockindex != -1) */
|
|
} /* if(k->getheader || !data->set.opt_no_body) */
|
|
|
|
}
|