(MFC) Create a Temporary Public Link to a DropBox File

Get a temporary link to stream content of a file. This link will expire in four hours and afterwards you will get 410 Gone.

For more information, see https://www.dropbox.com/developers/documentation/http/documentation#files-get_temporary_link

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkHttpResponse.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkHttp http;
    bool success;

    // Implements the following CURL command:

    // curl -X POST https://api.dropboxapi.com/2/files/get_temporary_link \
    //     --header "Authorization: Bearer DROPBOX_ACCESS_TOKEN" \
    //     --header "Content-Type: application/json" \
    //     --data "{\"path\": \"/video.mp4\"}"

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "path": "/video.mp4"
    // }

    CkJsonObject json;
    json.UpdateString("path","/video.mp4");

    http.SetRequestHeader("Authorization","Bearer DROPBOX_ACCESS_TOKEN");
    http.SetRequestHeader("Content-Type","application/json");

    CkHttpResponse *resp = http.PostJson3("https://api.dropboxapi.com/2/files/get_temporary_link","application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        strOut.append(http.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    CkStringBuilder sbResponseBody;
    resp->GetBodySb(sbResponseBody);
    CkJsonObject jResp;
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    strOut.append("Response Body:");
    strOut.append("\r\n");
    strOut.append(jResp.emit());
    strOut.append("\r\n");

    int respStatusCode = resp->get_StatusCode();
    strOut.append("Response Status Code = ");
    strOut.appendInt(respStatusCode);
    strOut.append("\r\n");
    if (respStatusCode >= 400) {
        strOut.append("Response Header:");
        strOut.append("\r\n");
        strOut.append(resp->header());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        delete resp;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    delete resp;

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "metadata": {
    //     "name": "Prime_Numbers.txt",
    //     "id": "id:a4ayc_80_OEAAAAAAAAAXw",
    //     "client_modified": "2015-05-12T15:50:38Z",
    //     "server_modified": "2015-05-12T15:50:38Z",
    //     "rev": "a1c10ce0dd78",
    //     "size": 7212,
    //     "path_lower": "/homework/math/prime_numbers.txt",
    //     "path_display": "/Homework/math/Prime_Numbers.txt",
    //     "sharing_info": {
    //       "read_only": true,
    //       "parent_shared_folder_id": "84528192421",
    //       "modified_by": "dbid:AAH4f99T0taONIb-OurWxbNQ6ywGRopQngc"
    //     },
    //     "is_downloadable": true,
    //     "property_groups": [
    //       {
    //         "template_id": "ptid:1a5n2i6d3OYEAAAAAAAAAYa",
    //         "fields": [
    //           {
    //             "name": "Security Policy",
    //             "value": "Confidential"
    //           }
    //         ]
    //       }
    //     ],
    //     "has_explicit_shared_members": false,
    //     "content_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
    //   },
    //   "link": "https://dl.dropboxusercontent.com/apitl/1/YXNkZmFzZGcyMzQyMzI0NjU2NDU2NDU2"
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    const char *template_id = 0;
    int j;
    int count_j;
    const char *name = 0;
    const char *value = 0;

    const char *metadataName = jResp.stringOf("metadata.name");
    const char *metadataId = jResp.stringOf("metadata.id");
    const char *metadataClient_modified = jResp.stringOf("metadata.client_modified");
    const char *metadataServer_modified = jResp.stringOf("metadata.server_modified");
    const char *metadataRev = jResp.stringOf("metadata.rev");
    int metadataSize = jResp.IntOf("metadata.size");
    const char *metadataPath_lower = jResp.stringOf("metadata.path_lower");
    const char *metadataPath_display = jResp.stringOf("metadata.path_display");
    bool metadataSharing_infoRead_only = jResp.BoolOf("metadata.sharing_info.read_only");
    const char *metadataSharing_infoParent_shared_folder_id = jResp.stringOf("metadata.sharing_info.parent_shared_folder_id");
    const char *metadataSharing_infoModified_by = jResp.stringOf("metadata.sharing_info.modified_by");
    bool metadataIs_downloadable = jResp.BoolOf("metadata.is_downloadable");
    bool metadataHas_explicit_shared_members = jResp.BoolOf("metadata.has_explicit_shared_members");
    const char *metadataContent_hash = jResp.stringOf("metadata.content_hash");
    const char *link = jResp.stringOf("link");
    int i = 0;
    int count_i = jResp.SizeOfArray("metadata.property_groups");
    while (i < count_i) {
        jResp.put_I(i);
        template_id = jResp.stringOf("metadata.property_groups[i].template_id");
        j = 0;
        count_j = jResp.SizeOfArray("metadata.property_groups[i].fields");
        while (j < count_j) {
            jResp.put_J(j);
            name = jResp.stringOf("metadata.property_groups[i].fields[j].name");
            value = jResp.stringOf("metadata.property_groups[i].fields[j].value");
            j = j + 1;
        }

        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }