Update README.md

Author: zenden2k

README.md

@@ -1,2 +1,83 @@
 # curl-cpp-wrapper
-Simple libcurl wrapper in C++
+
+A very simple HTTP client (C++ wrapper for curl). Requires libcurl http://curl.haxx.se
+If you are using Visual C++ your also have to install msinttypes (headers are provided in "include" directory).
+
+Usage
+
+Do a GET request:
+```cpp
+NetworkClient nc;
+nc.doGet("http://google.com/?q=" + nc.urlEncode("Smelly cat");
+std::cout << nc.responseBody();
+```
+
+Do a POST request:
+```cpp
+nc.setUrl("https://www.googleapis.com/oauth2/v3/token");
+nc.addQueryParam("refresh_token", refreshToken); 
+nc.addQueryParam("client_id", clientId); 
+nc.addQueryParam("client_secret", clientSecret); 
+nc.addQueryParam("grant_type", "refresh_token"); 
+nc.doPost("");
+```
+
+Do a POST request with RAW data:
+```cpp
+nc.setUrl("https://www.googleapis.com/oauth2/v3/token");
+nc.doPost("param1=value&param=value");
+```
+
+Downloading a file:
+```cpp
+NetworkClient nc;
+nc.setOutputFile("d:\\image.png"); //only UTF-8 file names are supported on Windows
+nc.doGet("http://i.imgur.com/DDf2wbJ.png");
+```
+
+Uploading a file:
+```cpp
+#include "NetworkClient.h"
+#include "Core/Utils/CoreUtils.h"
+NetworkClient nc;
+std::string fileName = "c:\\test\\file.txt"; //only UTF-8 file names are supported on Windows
+//std::string fileName = IuCoreUtils::SystemLocaleToUtf8(fileName); <-- if you want to upload a file with ANSI filename on Windows
+nc.setUrl("http://takebin.com/action");
+nc.addQueryParamFile("file", fileName, IuCoreUtils::ExtractFileName(FileName),"");
+nc.addQueryParam("fileDesc", "cool file");
+
+nc.doUploadMultipartData();
+if ( nc.responseCode() == 200 )  {
+		std::cout << nc.responseBody();
+}
+```
+
+Do a PUT request:
+```cpp
+nc.setMethod("PUT");
+nc.setUrl("https://www.googleapis.com/drive/v2/files/" + id);
+nc.addQueryHeader("Authorization", "Basic ");
+nc.addQueryHeader("Content-Type", "application/json");
+std::string postData = "{\"title\" = \"SmellyCat.jpg\"}";
+nc.doUpload("", postData);
+```
+
+Uploading a file to FTP:
+```cpp
+std::string fileName = "c:\\test\\file.txt";
+nc.setUrl("ftp://example.com");
+nc.setMethod("PUT");
+nc.doUpload(fileName, "");
+```
+
+Using proxy:
+```cpp
+nc.setProxy("127.0.0.1", "8888", CURLPROXY_HTTP); // CURLPROXY_HTTP, CURLPROXY_SOCKS4, CURLPROXY_SOCKS4A, CURLPROXY_SOCKS5, CURLPROXY_SOCKS5_HOSTNAME
+```
+Custom request header:
+```
+nc.addQueryHeader("User-Agent", "Mozilla/5.0");
+```
+
+If you want to use HTTPS, you should compile libcurl with openssl support (you could also use WinSSL on Windows). 
+If you compile libcurl for windows with OpenSSL support (instead of WinSSL), you should put "curl-ca-bundle.crt" file into your application's directory).