Added support for Stream (issue #300)

examples/JsonHttpClient/JsonHttpClient.ino

@@ -9,8 +9,8 @@
 // If you like this project, please add a star!
 
 #include <ArduinoJson.h>
-#include <SPI.h>
 #include <Ethernet.h>
+#include <SPI.h>
 
 EthernetClient client;
 
@@ -36,11 +36,8 @@ void setup() {
 void loop() {
   if (connect(server)) {
     if (sendRequest(server, resource) && skipResponseHeaders()) {
-      char response[MAX_CONTENT_SIZE];
-      readReponseContent(response, sizeof(response));
-
       UserData userData;
-      if (parseUserData(response, &userData)) {
+      if (readReponseContent(&userData)) {
         printUserData(&userData);
       }
     }
@@ -89,7 +86,7 @@ bool sendRequest(const char* host, const char* resource) {
   client.print(resource);
   client.println(" HTTP/1.0");
   client.print("Host: ");
-  client.println(server);
+  client.println(host);
   client.println("Connection: close");
   client.println();
 
@@ -111,13 +108,6 @@ bool skipResponseHeaders() {
   return ok;
 }
 
-// Read the body of the response from the HTTP server
-void readReponseContent(char* content, size_t maxSize) {
-  size_t length = client.readBytes(content, maxSize);
-  content[length] = 0;
-  Serial.println(content);
-}
-
 // Parse the JSON from the input string and extract the interesting values
 // Here is the JSON we need to parse
 // {
@@ -143,21 +133,20 @@ void readReponseContent(char* content, size_t maxSize) {
 //     "bs": "harness real-time e-markets"
 //   }
 // }
-bool parseUserData(char* content, struct UserData* userData) {
+bool readReponseContent(struct UserData* userData) {
   // Compute optimal size of the JSON buffer according to what we need to parse.
   // This is only required if you use StaticJsonBuffer.
   const size_t BUFFER_SIZE =
-      JSON_OBJECT_SIZE(8)     // the root object has 8 elements
-      + JSON_OBJECT_SIZE(5)   // the "address" object has 5 elements
-      + JSON_OBJECT_SIZE(2)   // the "geo" object has 2 elements
-      + JSON_OBJECT_SIZE(3);  // the "company" object has 3 elements
+      JSON_OBJECT_SIZE(8)    // the root object has 8 elements
+      + JSON_OBJECT_SIZE(5)  // the "address" object has 5 elements
+      + JSON_OBJECT_SIZE(2)  // the "geo" object has 2 elements
+      + JSON_OBJECT_SIZE(3)  // the "company" object has 3 elements
+      + MAX_CONTENT_SIZE;    // additional space for strings
 
-  // Allocate a temporary memory pool on the stack
-  StaticJsonBuffer<BUFFER_SIZE> jsonBuffer;
-  // If the memory pool is too big for the stack, use this instead:
-  // DynamicJsonBuffer jsonBuffer;
+  // Allocate a temporary memory pool
+  DynamicJsonBuffer jsonBuffer(BUFFER_SIZE);
 
-  JsonObject& root = jsonBuffer.parseObject(content);
+  JsonObject& root = jsonBuffer.parseObject(client);
 
   if (!root.success()) {
     Serial.println("JSON parsing failed!");