feat: implement retry mechanism and timeout handling for API requests

src/api.cpp

@@ -124,28 +124,69 @@ void sendToApi(void *parameter) {
     String octoToken = params->octoToken;
     bool triggerWeightUpdate = params->triggerWeightUpdate;
     String spoolIdForWeight = params->spoolIdForWeight;
-    uint16_t weightValue = params->weightValue;    
+    uint16_t weightValue = params->weightValue;
 
-    HTTPClient http;
-    http.setReuse(false);
+    // Retry mechanism with configurable parameters
+    const uint8_t MAX_RETRIES = 3;
+    const uint16_t RETRY_DELAY_MS = 1000; // 1 second between retries
+    const uint16_t HTTP_TIMEOUT_MS = 10000; // 10 second HTTP timeout
+    
+    bool success = false;
+    int httpCode = -1;
+    String responsePayload = "";
+    
+    // Try request with retries
+    for (uint8_t attempt = 1; attempt <= MAX_RETRIES && !success; attempt++) {
+        Serial.printf("API Request attempt %d/%d to: %s\n", attempt, MAX_RETRIES, spoolsUrl.c_str());
+        
+        HTTPClient http;
+        http.setReuse(false);
+        http.setTimeout(HTTP_TIMEOUT_MS); // Set HTTP timeout
+        
+        http.begin(spoolsUrl);
+        http.addHeader("Content-Type", "application/json");
+        if (octoEnabled && octoToken != "") http.addHeader("X-Api-Key", octoToken);
 
-    http.begin(spoolsUrl);
-    http.addHeader("Content-Type", "application/json");
-    if (octoEnabled && octoToken != "") http.addHeader("X-Api-Key", octoToken);
+        // Execute HTTP request based on type
+        if (httpType == "PATCH") httpCode = http.PATCH(updatePayload);
+        else if (httpType == "POST") httpCode = http.POST(updatePayload);
+        else if (httpType == "GET") httpCode = http.GET();
+        else httpCode = http.PUT(updatePayload);
 
-    int httpCode;
-    if (httpType == "PATCH") httpCode = http.PATCH(updatePayload);
-    else if (httpType == "POST") httpCode = http.POST(updatePayload);
-    else if (httpType == "GET") httpCode = http.GET();
-    else httpCode = http.PUT(updatePayload);
+        // Check if request was successful
+        if (httpCode == HTTP_CODE_OK || httpCode == HTTP_CODE_CREATED) {
+            responsePayload = http.getString();
+            success = true;
+            Serial.printf("API Request successful on attempt %d, HTTP Code: %d\n", attempt, httpCode);
+        } else {
+            Serial.printf("API Request failed on attempt %d, HTTP Code: %d (%s)\n", 
+                         attempt, httpCode, http.errorToString(httpCode).c_str());
+            
+            // Don't retry on certain error codes (client errors)
+            if (httpCode >= 400 && httpCode < 500 && httpCode != 408 && httpCode != 429) {
+                Serial.println("Client error detected, stopping retries");
+                break;
+            }
+            
+            // Wait before retry (except on last attempt)
+            if (attempt < MAX_RETRIES) {
+                Serial.printf("Waiting %dms before retry...\n", RETRY_DELAY_MS);
+                http.end();
+                vTaskDelay(RETRY_DELAY_MS / portTICK_PERIOD_MS);
+                continue;
+            }
+        }
+        
+        http.end();
+    }
 
-    if (httpCode == HTTP_CODE_OK) {
+    // Process successful response
+    if (success) {
         Serial.println("Spoolman Abfrage erfolgreich");
 
         // Restgewicht der Spule auslesen
-        String payload = http.getString();
         JsonDocument doc;
-        DeserializationError error = deserializeJson(doc, payload);
+        DeserializationError error = deserializeJson(doc, responsePayload);
         if (error) {
             Serial.print("Fehler beim Parsen der JSON-Antwort: ");
             Serial.println(error.c_str());
@@ -225,10 +266,9 @@ void sendToApi(void *parameter) {
     } else if (httpCode == HTTP_CODE_CREATED) {
         Serial.println("Spoolman erfolgreich erstellt");
         
-        // Parse response for created resources
-        String payload = http.getString();
+        // Parse response for created resources  
         JsonDocument doc;
-        DeserializationError error = deserializeJson(doc, payload);
+        DeserializationError error = deserializeJson(doc, responsePayload);
         if (error) {
             Serial.print("Fehler beim Parsen der JSON-Antwort: ");
             Serial.println(error.c_str());
@@ -280,14 +320,17 @@ void sendToApi(void *parameter) {
             Serial.println(weightPayload);
 
             // Execute weight update
-            http.begin(weightUrl);
-            http.addHeader("Content-Type", "application/json");
+            HTTPClient weightHttp;
+            weightHttp.setReuse(false);
+            weightHttp.setTimeout(HTTP_TIMEOUT_MS);
+            weightHttp.begin(weightUrl);
+            weightHttp.addHeader("Content-Type", "application/json");
             
-            int weightHttpCode = http.PUT(weightPayload);
+            int weightHttpCode = weightHttp.PUT(weightPayload);
             
             if (weightHttpCode == HTTP_CODE_OK) {
                 Serial.println("Weight update successful");
-                String weightResponse = http.getString();
+                String weightResponse = weightHttp.getString();
                 JsonDocument weightResponseDoc;
                 DeserializationError weightError = deserializeJson(weightResponseDoc, weightResponse);
                 
@@ -310,6 +353,7 @@ void sendToApi(void *parameter) {
                 oledShowProgressBar(1, 1, "Failure!", "Weight update");
             }
             
+            weightHttp.end();
             weightDoc.clear();
         }
     } else {
@@ -325,14 +369,25 @@ void sendToApi(void *parameter) {
         case API_REQUEST_BAMBU_UPDATE:
             oledShowProgressBar(1, 1, "Failure!", "Bambu update");
             break;
+        case API_REQUEST_VENDOR_CHECK:
+            oledShowProgressBar(1, 1, "Failure!", "Vendor check");
+            foundVendorId = 0; // Set to 0 to indicate error/not found
+            break;
         case API_REQUEST_VENDOR_CREATE:
             oledShowProgressBar(1, 1, "Failure!", "Vendor create");
+            createdVendorId = 0; // Set to 0 to indicate error
+            break;
+        case API_REQUEST_FILAMENT_CHECK:
+            oledShowProgressBar(1, 1, "Failure!", "Filament check");
+            foundFilamentId = 0; // Set to 0 to indicate error/not found
             break;
         case API_REQUEST_FILAMENT_CREATE:
             oledShowProgressBar(1, 1, "Failure!", "Filament create");
+            createdFilamentId = 0; // Set to 0 to indicate error
             break;
         case API_REQUEST_SPOOL_CREATE:
             oledShowProgressBar(1, 1, "Failure!", "Spool create");
+            createdSpoolId = 0; // Set to 0 to indicate error instead of hanging
             break;
         }
         Serial.println("Fehler beim Senden an Spoolman! HTTP Code: " + String(httpCode));
@@ -340,7 +395,6 @@ void sendToApi(void *parameter) {
         nfcReaderState = NFC_IDLE; // Reset NFC state to allow retry
     }
 
-    http.end();
     vTaskDelay(50 / portTICK_PERIOD_MS);
 
     // Speicher freigeben
@@ -952,6 +1006,13 @@ uint16_t createSpool(uint16_t vendorId, uint16_t filamentId, JsonDocument& paylo
     while(createdSpoolId == 65535) {
         vTaskDelay(50 / portTICK_PERIOD_MS);
     }
+    
+    // Check if spool creation was successful
+    if (createdSpoolId == 0) {
+        Serial.println("ERROR: Spool creation failed");
+        nfcReaderState = NFC_IDLE; // Reset NFC state
+        return 0;
+    }
 
     // Write data to tag with startWriteJsonToTag
     // void startWriteJsonToTag(const bool isSpoolTag, const char* payload);