C

Box.com Streaming Upload File

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Demonstrates how to upload a file to box.com, streaming the file directly from the filesystem.

Note: This example requires a fix that is included in Chilkat v9.5.0.70 and above.

C

#include <C_CkRest.h>
#include <C_CkOAuth2.h>
#include <C_CkJsonObject.h>
#include <C_CkStream.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRest rest;
    HCkOAuth2 oauth2;
    BOOL bAutoReconnect;
    HCkJsonObject jsonAttr;
    HCkStream fileStream;
    const char *responseBody;

    success = FALSE;

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    rest = CkRest_Create();

    //   Provide a previously obtained OAuth2 access token.
    oauth2 = CkOAuth2_Create();
    CkOAuth2_putAccessToken(oauth2,"BOX_ACCESS_TOKEN");
    CkRest_SetAuthOAuth2(rest,oauth2);

    // First, make the initial connection.
    // A single REST object, once connected, can be used for many Box REST API calls.
    // The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    // then it will be automatically re-established as needed.
    bAutoReconnect = TRUE;

    // ----------------------------------------------------------------------
    // IMPORTANT: Note that the domain is "upload.box.com", not "api.box.com"
    // ----------------------------------------------------------------------
    success = CkRest_Connect(rest,"upload.box.com",443,TRUE,bAutoReconnect);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkOAuth2_Dispose(oauth2);
        return;
    }

    // The request body uses the "multipart/form-data" format to transmit two "parts". 
    // The first part is called "attributes" and contains a JSON object with information about the file, including the name of the file 
    // and the ID of the parent folder. The second part contains the contents of the file. 
    // (Note that the name of the second "part" is ignored.)

    CkRest_AddHeader(rest,"Content-Type","multipart/form-data");

    // Provide the content for each part of the request...

    // First the JSON attributes.  Use "0" for the root folder.
    //   {"name":"hedgehogs.jpg", "parent":{"id":"0"}}
    jsonAttr = CkJsonObject_Create();
    CkJsonObject_UpdateString(jsonAttr,"name","hedgehogs.jpg");
    CkJsonObject_UpdateString(jsonAttr,"parent.id","0");

    CkRest_putPartSelector(rest,"1");
    CkRest_AddHeader(rest,"Content-Disposition","form-data; name=\"attributes\"; ");
    CkRest_SetMultipartBodyString(rest,CkJsonObject_emit(jsonAttr));

    // The upload will stream directly from a file.
    CkRest_putPartSelector(rest,"2");
    CkRest_AddHeader(rest,"Content-Disposition","form-data; name=\"file\"; filename=\"hedgehogs.jpg\"");
    // "application/octet-stream" can be safely used for any type file..
    CkRest_AddHeader(rest,"Content-Type","application/octet-stream");

    // IMPORTANT: This example requires Chilkat v9.5.0.70 or later, for a fix that was made in
    // multipart/streaming uploads. 
    fileStream = CkStream_Create();
    CkStream_putSourceFile(fileStream,"qa_data/jpg/hedgehogs.jpg");
    CkRest_SetMultipartBodyStream(rest,fileStream);

    // Restore the PartSelector to "0" (for safety, in case something else sends another request on this object)
    CkRest_putPartSelector(rest,"0");

    // Send the multipart/form-data request, which uploads the file by streaming directly from the filesystem.
    responseBody = CkRest_fullRequestMultipart(rest,"POST","/api/2.0/files/content");
    if (CkRest_getLastMethodSuccess(rest) != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkOAuth2_Dispose(oauth2);
        CkJsonObject_Dispose(jsonAttr);
        CkStream_Dispose(fileStream);
        return;
    }

    // A 201 is received for a successful upload
    if (CkRest_getResponseStatusCode(rest) != 201) {
        printf("Box.com upload failed.\n");
        printf("Request header:\n");
        printf("%s\n",CkRest_lastRequestHeader(rest));
        printf("---\n");
        printf("Response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("Response body:\n");
        printf("%s\n",responseBody);
        CkRest_Dispose(rest);
        CkOAuth2_Dispose(oauth2);
        CkJsonObject_Dispose(jsonAttr);
        CkStream_Dispose(fileStream);
        return;
    }

    printf("File uploaded.\n");


    CkRest_Dispose(rest);
    CkOAuth2_Dispose(oauth2);
    CkJsonObject_Dispose(jsonAttr);
    CkStream_Dispose(fileStream);

    }