Merge flip_trader from https://github.com/jblanked/FlipTrader

# Conflicts:
#	flip_trader/flipper_http/flipper_http.c
#	flip_trader/flipper_http/flipper_http.h

flip_trader/flipper_http/flipper_http.c

@@ -13,6 +13,15 @@ bool flipper_http_append_to_file(
     File* file = storage_file_alloc(storage);
 
     if(start_new_file) {
+        // Delete the file if it already exists
+        if(storage_file_exists(storage, file_path)) {
+            if(!storage_simply_remove_recursive(storage, file_path)) {
+                FURI_LOG_E(HTTP_TAG, "Failed to delete file: %s", file_path);
+                storage_file_free(file);
+                furi_record_close(RECORD_STORAGE);
+                return false;
+            }
+        }
         // Open the file in write mode
         if(!storage_file_open(file, file_path, FSAM_WRITE, FSOM_CREATE_ALWAYS)) {
             FURI_LOG_E(HTTP_TAG, "Failed to open file for writing: %s", file_path);
@@ -156,10 +165,14 @@ int32_t flipper_http_worker(void* context) {
                     // Write to file if buffer is full
                     if(file_buffer_len >= FILE_BUFFER_SIZE) {
                         if(!flipper_http_append_to_file(
-                               file_buffer, file_buffer_len, false, fhttp.file_path)) {
+                               file_buffer,
+                               file_buffer_len,
+                               fhttp.just_started_bytes,
+                               fhttp.file_path)) {
                             FURI_LOG_E(HTTP_TAG, "Failed to append data to file");
                         }
                         file_buffer_len = 0;
+                        fhttp.just_started_bytes = false;
                     }
                 }
 
@@ -1149,6 +1162,7 @@ void flipper_http_rx_callback(const char* line, void* context) {
         fhttp.state = RECEIVING;
         // for GET request, save data only if it's a bytes request
         fhttp.save_bytes = fhttp.is_bytes_request;
+        fhttp.just_started_bytes = true;
         return;
     } else if(strstr(line, "[POST/SUCCESS]") != NULL) {
         FURI_LOG_I(HTTP_TAG, "POST request succeeded.");
@@ -1157,6 +1171,7 @@ void flipper_http_rx_callback(const char* line, void* context) {
         fhttp.state = RECEIVING;
         // for POST request, save data only if it's a bytes request
         fhttp.save_bytes = fhttp.is_bytes_request;
+        fhttp.just_started_bytes = true;
         return;
     } else if(strstr(line, "[PUT/SUCCESS]") != NULL) {
         FURI_LOG_I(HTTP_TAG, "PUT request succeeded.");

flip_trader/flipper_http/flipper_http.h

@@ -74,6 +74,8 @@ typedef struct {
     bool is_bytes_request; // Flag to indicate if the request is for bytes
     bool save_bytes; // Flag to save the received data to a file
     bool save_received_data; // Flag to save the received data to a file
+
+    bool just_started_bytes; // Indicates if bytes data reception has just started
 } FlipperHTTP;
 
 extern FlipperHTTP fhttp;