repeat HTTP requests once

src/lib/utils/httpclient.cpp

@@ -431,12 +431,12 @@ void HttpClient::disconnect() {
   }
 }
 
-bool HttpClient::get(const string& uri, const string& body, string* response, time_t* time) {
-  return request("GET", uri, body, response, time);
+bool HttpClient::get(const string& uri, const string& body, string* response, bool* repeatable, time_t* time) {
+  return request("GET", uri, body, response, repeatable, time);
 }
 
-bool HttpClient::post(const string& uri, const string& body, string* response) {
-  return request("POST", uri, body, response);
+bool HttpClient::post(const string& uri, const string& body, string* response, bool* repeatable) {
+  return request("POST", uri, body, response, repeatable);
 }
 
 const int indexToMonth[] = {
@@ -446,9 +446,13 @@ const int indexToMonth[] = {
   -1, -1,  4, -1, -1, -1, -1, -1,  // 24-31
 };
 
-bool HttpClient::request(const string& method, const string& uri, const string& body, string* response, time_t* time) {
+bool HttpClient::request(const string& method, const string& uri, const string& body, string* response,
+bool* repeatable, time_t* time) {
   if (!ensureConnected()) {
     *response = "not connected";
+    if (repeatable) {
+      *repeatable = true;
+    }
     return false;
   }
   ostringstream ostr;
@@ -473,6 +477,9 @@ bool HttpClient::request(const string& method, const string& uri, const string&
     if (sent < 0) {
       disconnect();
       *response = "send error";
+      if (repeatable) {
+        *repeatable = true;
+      }
       return false;
     }
     pos += sent;

src/lib/utils/httpclient.h

@@ -188,19 +188,24 @@ class HttpClient {
    * @param uri the URI string.
    * @param body the optional body to send.
    * @param response the response body from the server (or the HTTP header on error).
+   * @param repeatable optional pointer to a bool in which to store whether the request should be repeated later on
+   * (e.g. due to temporary connectivity issues).
    * @param time optional pointer to a @a time_t value for storing the modification time of the file, or nullptr.
    * @return true on success, false on error.
    */
-  bool get(const string& uri, const string& body, string* response, time_t* time = nullptr);
+  bool get(const string& uri, const string& body, string* response, bool* repeatable = nullptr,
+  time_t* time = nullptr);
 
   /**
    * Execute a POST request.
    * @param uri the URI string.
    * @param body the optional body to send.
    * @param response the response body from the server (or the HTTP header on error).
+   * @param repeatable optional pointer to a bool in which to store whether the request should be repeated later on
+   * (e.g. due to temporary connectivity issues).
    * @return true on success, false on error.
    */
-  bool post(const string& uri, const string& body, string* response);
+  bool post(const string& uri, const string& body, string* response, bool* repeatable = nullptr);
 
   /**
    * Execute an arbitrary request.
@@ -208,10 +213,13 @@ class HttpClient {
    * @param uri the URI string.
    * @param body the optional body to send.
    * @param response the response body from the server (or the HTTP header on error).
+   * @param repeatable optional pointer to a bool in which to store whether the request should be repeated later on
+   * (e.g. due to temporary connectivity issues).
    * @param time optional pointer to a @a time_t value for storing the modification time of the file, or nullptr.
    * @return true on success, false on error.
    */
-  bool request(const string& method, const string& uri, const string& body, string* response, time_t* time = nullptr);
+  bool request(const string& method, const string& uri, const string& body, string* response,
+  bool* repeatable = nullptr, time_t* time = nullptr);
 
  private:
   /**