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(MFC) Upload String to Dropbox

Uploads a string to a file on Dropbox. This example can upload content up to 150MB, assuming a 150MB string fits in memory for your app. Larger files must be uploaded with an upload session (upload_session/start).

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

// Needs #include <CkRest.h>
// Needs #include <CkJsonObject.h>
// Needs #include <CkDateTime.h>
// Needs #include <CkDtObj.h>

    CkString strOut;

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

    //  A Dropbox access token should have been previously obtained.
    //  Dropbox access tokens do not expire.
    //  See Dropbox Access Token.

    CkRest rest;

    //  Connect to Dropbox
    bool success = rest.Connect("content.dropboxapi.com",443,true,true);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Add request headers.
    rest.AddHeader("Content-Type","application/octet-stream");
    rest.AddHeader("Authorization","Bearer DROPBOX_ACCESS_TOKEN");

    //  The upload "parameters" contained in JSON passed in an HTTP request header.
    //  This is the JSON to be added in this example:
    //  {
    //     "path": "/jack.txt",
    //     "mode": "add",
    //     "autorename": true,
    //     "mute": false
    //  }

    //  This will be the content of the file created in Dropbox.
    const char *content = "All work and no play makes Jack a dull boy";

    CkJsonObject json;
    json.AppendString("path","/jack.txt");
    json.AppendString("mode","add");
    json.AppendBool("autorename",true);
    json.AppendBool("mute",false);
    rest.AddHeader("Dropbox-API-Arg",json.emit());

    //  Do the upload.  The URL is https://content.dropboxapi.com/2/files/upload.
    //  We already connected to content.dropboxapi.com using TLS (i.e. HTTPS),
    //  so now we only need to specify the path "/2/files/upload".

    const char *responseStr = rest.fullRequestString("POST","/2/files/upload",content);
    if (rest.get_LastMethodSuccess() != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  When successful, Dropbox responds with a 200 response code.
    if (rest.get_ResponseStatusCode() != 200) {
        //  Examine the request/response to see what happened.
        strOut.append("response status code = ");
        strOut.appendInt(rest.get_ResponseStatusCode());
        strOut.append("\r\n");
        strOut.append("response status text = ");
        strOut.append(rest.responseStatusText());
        strOut.append("\r\n");
        strOut.append("response header: ");
        strOut.append(rest.responseHeader());
        strOut.append("\r\n");
        strOut.append("response body (if any): ");
        strOut.append(responseStr);
        strOut.append("\r\n");
        strOut.append("---");
        strOut.append("\r\n");
        strOut.append("LastRequestStartLine: ");
        strOut.append(rest.lastRequestStartLine());
        strOut.append("\r\n");
        strOut.append("LastRequestHeader: ");
        strOut.append(rest.lastRequestHeader());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("LastRequestHeader: ");
    strOut.append(rest.lastRequestHeader());
    strOut.append("\r\n");

    //  The response is JSON.
    CkJsonObject jsonResp;
    jsonResp.put_EmitCompact(false);
    jsonResp.Load(responseStr);

    //  Show the JSON response.
    strOut.append(jsonResp.emit());
    strOut.append("\r\n");

    //  Returns JSON that looks like this:
    // {
    //   "name": "jack.txt",
    //   "path_lower": "/jack.txt",
    //   "path_display": "/jack.txt",
    //   "id": "id:yqx4-tE_NKAAAAAAAAAAAQ",
    //   "client_modified": "2016-06-02T20:42:11Z",
    //   "server_modified": "2016-06-02T20:42:11Z",
    //   "rev": "8482db15f",
    //   "size": 42
    // }

    //  Sample code to get data from the JSON response:
    int size = jsonResp.IntOf("size");
    strOut.append("size = ");
    strOut.appendInt(size);
    strOut.append("\r\n");

    const char *rev = jsonResp.stringOf("rev");
    strOut.append("rev = ");
    strOut.append(rev);
    strOut.append("\r\n");

    const char *clientModified = jsonResp.stringOf("client_modified");
    CkDateTime ckdt;
    ckdt.SetFromTimestamp(clientModified);
    bool bLocalTime = true;
    CkDtObj *dt = ckdt.GetDtObj(bLocalTime);
    strOut.appendInt(dt->get_Day());
    strOut.append("/");
    strOut.appendInt(dt->get_Month());
    strOut.append("/");
    strOut.appendInt(dt->get_Year());
    strOut.append(" ");
    strOut.appendInt(dt->get_Hour());
    strOut.append(":");
    strOut.appendInt(dt->get_Minute());
    strOut.append("\r\n");
    delete dt;


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

 

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