Add new del API for HTTP DELETE method

Author: sandeepmistry

HttpClient.cpp

@@ -327,6 +327,31 @@ int HttpClient::put(const char* aURLPath, const char* aContentType, int aContent
     return startRequest(aURLPath, HTTP_METHOD_PUT, aContentType, aContentLength, aBody);
 }
 
+int HttpClient::del(const char* aURLPath)
+{
+    return startRequest(aURLPath, HTTP_METHOD_DELETE);
+}
+
+int HttpClient::del(const String& aURLPath)
+{
+    return del(aURLPath.c_str());
+}
+
+int HttpClient::del(const char* aURLPath, const char* aContentType, const char* aBody)
+{
+    return del(aURLPath, aContentType, strlen(aBody),  (const byte*)aBody);
+}
+
+int HttpClient::del(const String& aURLPath, const String& aContentType, const String& aBody)
+{
+    return del(aURLPath.c_str(), aContentType.c_str(), aBody.length(), (const byte*)aBody.c_str());
+}
+
+int HttpClient::del(const char* aURLPath, const char* aContentType, int aContentLength, const byte aBody[])
+{
+    return startRequest(aURLPath, HTTP_METHOD_DELETE, aContentType, aContentLength, aBody);
+}
+
 int HttpClient::responseStatusCode()
 {
     if (iState < eRequestSent)

HttpClient.h

@@ -104,6 +104,24 @@ class HttpClient : public Client
     int put(const String& aURLPath, const String& aContentType, const String& aBody);
     int put(const char* aURLPath, const char* aContentType, int aContentLength, const byte aBody[]);
 
+    /** Connect to the server and start to send a DELETE request.
+      @param aURLPath     Url to request
+      @return 0 if successful, else error
+    */
+    int del(const char* aURLPath);
+    int del(const String& aURLPath);
+
+    /** Connect to the server and start to send a DELETE request
+        with body and content type
+      @param aURLPath     Url to request
+      @param aContentType Content type of request body
+      @param aBody        Body of the request
+      @return 0 if successful, else error
+    */
+    int del(const char* aURLPath, const char* aContentType, const char* aBody);
+    int del(const String& aURLPath, const String& aContentType, const String& aBody);
+    int del(const char* aURLPath, const char* aContentType, int aContentLength, const byte aBody[]);
+
     /** Connect to the server and start to send the request.
       @param aURLPath        Url to request
       @param aHttpMethod     Type of HTTP request to make, e.g. "GET", "POST", etc.

examples/SimpleDelete/SimpleDelete.ino

@@ -50,14 +50,10 @@ void setup() {
 
 void loop() {
   Serial.println("making DELETE request");
+  String contentType = "application/x-www-form-urlencoded";
   String delData = "name=light&age=46";
 
-  client.beginRequest();
-  client.startRequest("/", HTTP_METHOD_DELETE);
-  client.sendHeader("Content-Type", "application/x-www-form-urlencoded");
-  client.sendHeader("Content-Length", delData.length());
-  client.endRequest();
-  client.write((const byte*)delData.c_str(), delData.length());
+  client.del("/", contentType, delData);
 
   // read the status code and content length of the response
   statusCode = client.responseStatusCode();