From d261fa35f57cd620907bb050b1cbe7b8aff98fbb Mon Sep 17 00:00:00 2001
From: Sandeep Mistry <s.mistry@arduino.cc>
Date: Tue, 3 Jan 2017 16:20:03 -0500
Subject: [PATCH] Add support for PATCH operations

---
 keywords.txt       |  1 +
 src/HttpClient.cpp | 25 +++++++++++++++++++++++++
 src/HttpClient.h   | 19 +++++++++++++++++++
 3 files changed, 45 insertions(+)

diff --git a/keywords.txt b/keywords.txt
index f62ba70..7c2061c 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -17,6 +17,7 @@ WebSocketClient	KEYWORD1
 get	KEYWORD2
 post	KEYWORD2
 put	KEYWORD2
+patch	KEYWORD2
 startRequest	KEYWORD2
 beginRequest	KEYWORD2
 sendHeader	KEYWORD2
diff --git a/src/HttpClient.cpp b/src/HttpClient.cpp
index e66d488..f3accc3 100644
--- a/src/HttpClient.cpp
+++ b/src/HttpClient.cpp
@@ -332,6 +332,31 @@ int HttpClient::put(const char* aURLPath, const char* aContentType, int aContent
     return startRequest(aURLPath, HTTP_METHOD_PUT, aContentType, aContentLength, aBody);
 }
 
+int HttpClient::patch(const char* aURLPath)
+{
+    return startRequest(aURLPath, HTTP_METHOD_PATCH);
+}
+
+int HttpClient::patch(const String& aURLPath)
+{
+    return patch(aURLPath.c_str());
+}
+
+int HttpClient::patch(const char* aURLPath, const char* aContentType, const char* aBody)
+{
+    return patch(aURLPath, aContentType, strlen(aBody),  (const byte*)aBody);
+}
+
+int HttpClient::patch(const String& aURLPath, const String& aContentType, const String& aBody)
+{
+    return patch(aURLPath.c_str(), aContentType.c_str(), aBody.length(), (const byte*)aBody.c_str());
+}
+
+int HttpClient::patch(const char* aURLPath, const char* aContentType, int aContentLength, const byte aBody[])
+{
+    return startRequest(aURLPath, HTTP_METHOD_PATCH, aContentType, aContentLength, aBody);
+}
+
 int HttpClient::del(const char* aURLPath)
 {
     return startRequest(aURLPath, HTTP_METHOD_DELETE);
diff --git a/src/HttpClient.h b/src/HttpClient.h
index 141b2df..eaab360 100644
--- a/src/HttpClient.h
+++ b/src/HttpClient.h
@@ -29,6 +29,7 @@ static const int HTTP_ERROR_INVALID_RESPONSE =-4;
 #define HTTP_METHOD_GET    "GET"
 #define HTTP_METHOD_POST   "POST"
 #define HTTP_METHOD_PUT    "PUT"
+#define HTTP_METHOD_PATCH  "PATCH"
 #define HTTP_METHOD_DELETE "DELETE"
 #define HTTP_HEADER_CONTENT_LENGTH "Content-Length"
 #define HTTP_HEADER_CONTENT_TYPE   "Content-Type"
@@ -104,6 +105,24 @@ public:
     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 PATCH request.
+      @param aURLPath     Url to request
+      @return 0 if successful, else error
+    */
+    int patch(const char* aURLPath);
+    int patch(const String& aURLPath);
+
+    /** Connect to the server and send a PATCH 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 patch(const char* aURLPath, const char* aContentType, const char* aBody);
+    int patch(const String& aURLPath, const String& aContentType, const String& aBody);
+    int patch(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