(C) Google Cloud Storage: Update Object Metadata

See more Google Cloud Storage Examples

Demonstrates how to update (edit) the metadata associated with an object in a Google Cloud Storage bucket.

For more information, see https://cloud.google.com/storage/docs/viewing-editing-metadata#edit

Chilkat C/C++ Library Downloads
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#include <C_CkHttp.h>
#include <C_CkBinData.h>
#include <C_CkHttpResponse.h>
#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkBinData bdRequestBody;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;

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

    http = CkHttp_Create();

    // Implements the following CURL command:

    // curl -X PATCH --data-binary @JSON_FILE_NAME \
    //   -H "Authorization: Bearer OAUTH2_TOKEN" \
    //   -H "Content-Type: application/json" \
    //   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME"

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    bdRequestBody = CkBinData_Create();
    success = CkBinData_LoadFile(bdRequestBody,"JSON_FILE_PATH");
    if (success != TRUE) {
        printf("Failed to load JSON_FILE_PATH\n");
        CkHttp_Dispose(http);
        CkBinData_Dispose(bdRequestBody);
        return;
    }

    // Adds the "Authorization: Bearer OAUTH2_TOKEN" header.
    CkHttp_putAuthToken(http,"OAUTH2_TOKEN");

    resp = CkHttp_PBinaryBd(http,"PATCH","https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME",bdRequestBody,"application/json",FALSE,FALSE);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bdRequestBody);
        return;
    }

    sbResponseBody = CkStringBuilder_Create();
    CkHttpResponse_GetBodySb(resp,sbResponseBody);

    jResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jResp,sbResponseBody);
    CkJsonObject_putEmitCompact(jResp,FALSE);

    printf("Response Body:\n");
    printf("%s\n",CkJsonObject_emit(jResp));

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    if (respStatusCode >= 400) {
        printf("Response Header:\n");
        printf("%s\n",CkHttpResponse_header(resp));
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkBinData_Dispose(bdRequestBody);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

    CkHttpResponse_Dispose(resp);


    CkHttp_Dispose(http);
    CkBinData_Dispose(bdRequestBody);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }