Add retry support for failed LP requests

src/launchpad.cpp

@@ -257,8 +257,12 @@ std::optional<std::string> launchpad::api_get(const std::string& endpoint, const
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
 
-    CURLcode res = curl_easy_perform(curl);
+    bool tries = 0;
     long http_code = 0;
+
+    while (tries < 5) {
+        tries++;
+        CURLcode res = curl_easy_perform(curl);
         if (res != CURLE_OK) {
             std::cerr << "CURL GET error: " << curl_easy_strerror(res) << std::endl;
         }
@@ -268,17 +272,20 @@ std::optional<std::string> launchpad::api_get(const std::string& endpoint, const
         curl_easy_cleanup(curl);
 
         if (res != CURLE_OK) {
-        return std::nullopt;
+            continue;
         }
 
         if (http_code >= 400) {
-        std::cerr << "HTTP GET request to " << url << " failed with code: " << http_code << "\nResponse: " << readBuffer << std::endl;
-        return std::nullopt;
+            continue;
         }
 
         return readBuffer;
     }
 
+    std::cerr << "HTTP GET request to " << url << " failed with code: " << http_code << "\nResponse: " << readBuffer << std::endl;
+    return std::nullopt;
+}
+
 std::optional<std::string> launchpad::api_post(
     const std::string& endpoint,
     const std::map<std::string, std::string>& params,
@@ -327,8 +334,12 @@ std::optional<std::string> launchpad::api_post(
     curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
     curl_easy_setopt(curl, CURLOPT_WRITEDATA, &readBuffer);
 
-    CURLcode res = curl_easy_perform(curl);
+    bool tries = 0;
     long http_code = 0;
+
+    while (tries < 5) {
+        tries++;
+        CURLcode res = curl_easy_perform(curl);
         if (res != CURLE_OK) {
             std::cerr << "CURL POST error: " << curl_easy_strerror(res) << std::endl;
         }
@@ -338,16 +349,18 @@ std::optional<std::string> launchpad::api_post(
         curl_easy_cleanup(curl);
 
         if (res != CURLE_OK) {
-        return std::nullopt;
+            continue;
         }
 
         if (http_code >= 400) {
-        std::cerr << "HTTP POST request to " << url << " failed with code: " << http_code << "\nResponse: " << readBuffer << std::endl;
-        return std::nullopt;
+            continue;
         }
 
         return readBuffer;
     }
+    std::cerr << "HTTP POST request to " << url << " failed with code: " << http_code << "\nResponse: " << readBuffer << std::endl;
+    return std::nullopt;
+}
 
 std::optional<std::string> launchpad::api_patch(const std::string& endpoint, const nlohmann::json& data) {
     std::string url = build_full_url(endpoint) + "?ws.op=edit";