(Unicode C) Facebook Upload Photo from Local File

Uploads a new photo with a caption from a local file.

Chilkat C/C++ Library Downloads
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#include <C_CkHttpW.h>
#include <C_CkHttpRequestW.h>
#include <C_CkHttpResponseW.h>

void ChilkatSample(void)
    {
    HCkHttpW http;
    HCkHttpRequestW req;
    BOOL success;
    HCkHttpResponseW resp;
    const wchar_t *responseJson;

    // This example assumes Chilkat HTTP to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    http = CkHttpW_Create();

    req = CkHttpRequestW_Create();
    CkHttpRequestW_putHttpVerb(req,L"POST");
    CkHttpRequestW_putContentType(req,L"multipart/form-data");
    CkHttpRequestW_putPath(req,L"/v2.7/me/photos");

    // Use the previously obtained access token.
    // Note: The publish_actions scope is required to upload a photo.
    CkHttpRequestW_AddHeader(req,L"Authorization",L"Bearer FACEBOOK-ACCESS-TOKEN");

    // Send an "Expect: 100-continue" header in the request.
    // This causes the HTTP server to end a 100-continue response
    // immediately after receiving the HTTP header.  The client
    // (Chilkat) will receive this intermediate response, and if
    // it's not an error response, it knows that the HTTP server will
    // accept the data that is forthcoming.
    // The alternative is to get an error response after trying to upload
    // the entire contents of the files.
    CkHttpRequestW_AddHeader(req,L"Expect",L"100-continue");

    // Set a photo caption.
    CkHttpRequestW_AddParam(req,L"caption",L"Here are some penguins!");

    // Additional parameters can be added to the request by 
    // calling AddParam once per parameter.  
    // See https://developers.facebook.com/docs/graph-api/reference/user/photos
    // for more information about other optional parameters.

    // Indicate the local file to be uploaded.
    success = CkHttpRequestW_AddFileForUpload(req,L"source",L"qa_data/jpg/penguins2.jpg");
    if (success != TRUE) {
        wprintf(L"%s\n",CkHttpRequestW_lastErrorText(req));
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        return;
    }

    // Upload the image file..
    resp = CkHttpW_SynchronousRequest(http,L"graph.facebook.com",443,TRUE,req);
    if (CkHttpW_getLastMethodSuccess(http) != TRUE) {
        wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        CkHttpW_Dispose(http);
        CkHttpRequestW_Dispose(req);
        return;
    }

    // Examine the response body:
    responseJson = CkHttpResponseW_bodyStr(resp);
    wprintf(L"%s\n",responseJson);

    // The response contains JSON, such as this:
    // {"id":"10210224963435862","post_id":"10224048320139890_10210224963435862"}

    CkHttpResponseW_Dispose(resp);


    CkHttpW_Dispose(http);
    CkHttpRequestW_Dispose(req);

    }