C Google Cloud Storage: List Objects in a Bucket

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Retrieves a list of objects in the Google Cloud Storage bucket. The name of the bucket is specified in the URL's path. This example retrieves a listing of the objects in the "chilkat-test" bucket.

Documentation: https://cloud.google.com/storage/docs/json_api/v1/objects/list

CURL Command

curl -X GET https://www.googleapis.com/storage/v1/b/chilkat-bucket/o?project=MY_CLOUD_STORAGE_PROJECT \
    --header "Authorization: Bearer CLOUD_STORAGE_TOKEN"

C Example

#include <C_CkRest.h>
#include <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL success;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkStringBuilder sbResponseBody;
    int respStatusCode;
    HCkJsonObject jsonResponse;
    int i;
    int count_i;
    const char *kind;
    const char *id;
    const char *selfLink;
    const char *name;
    const char *bucket;
    const char *generation;
    const char *metageneration;
    const char *contentType;
    const char *timeCreated;
    const char *updated;
    const char *storageClass;
    const char *timeStorageClassUpdated;
    const char *size;
    const char *md5Hash;
    const char *mediaLink;
    const char *crc32c;
    const char *etag;

    rest = CkRest_Create();

    //  URL: https://www.googleapis.com/storage/v1/b/chilkat-bucket/o?project=MY_CLOUD_STORAGE_PROJECT
    bTls = TRUE;
    port = 443;
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"www.googleapis.com",port,bTls,bAutoReconnect);
    if (success != TRUE) {
        printf("ConnectFailReason: %d\n",CkRest_getConnectFailReason(rest));
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        return;
    }

    CkRest_AddHeader(rest,"Authorization","Bearer CLOUD_STORAGE_TOKEN");

    sbResponseBody = CkStringBuilder_Create();
    success = CkRest_FullRequestNoBodySb(rest,"GET","/storage/v1/b/chilkat-bucket/o?project=MY_CLOUD_STORAGE_PROJECT",sbResponseBody);
    if (success != TRUE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    respStatusCode = CkRest_getResponseStatusCode(rest);
    if (respStatusCode >= 400) {
        printf("Response Status Code = %d\n",respStatusCode);
        printf("Response Header:\n");
        printf("%s\n",CkRest_responseHeader(rest));
        printf("Response Body:\n");
        printf("%s\n",CkStringBuilder_getAsString(sbResponseBody));
        CkRest_Dispose(rest);
        CkStringBuilder_Dispose(sbResponseBody);
        return;
    }

    jsonResponse = CkJsonObject_Create();
    CkJsonObject_LoadSb(jsonResponse,sbResponseBody);

    //  See the Online Tool for Generating JSON Parse Code

    kind = CkJsonObject_stringOf(jsonResponse,"kind");
    i = 0;
    count_i = CkJsonObject_SizeOfArray(jsonResponse,"items");
    while (i < count_i) {
        CkJsonObject_putI(jsonResponse,i);
        kind = CkJsonObject_stringOf(jsonResponse,"items[i].kind");
        id = CkJsonObject_stringOf(jsonResponse,"items[i].id");
        selfLink = CkJsonObject_stringOf(jsonResponse,"items[i].selfLink");
        name = CkJsonObject_stringOf(jsonResponse,"items[i].name");
        bucket = CkJsonObject_stringOf(jsonResponse,"items[i].bucket");
        generation = CkJsonObject_stringOf(jsonResponse,"items[i].generation");
        metageneration = CkJsonObject_stringOf(jsonResponse,"items[i].metageneration");
        contentType = CkJsonObject_stringOf(jsonResponse,"items[i].contentType");
        timeCreated = CkJsonObject_stringOf(jsonResponse,"items[i].timeCreated");
        updated = CkJsonObject_stringOf(jsonResponse,"items[i].updated");
        storageClass = CkJsonObject_stringOf(jsonResponse,"items[i].storageClass");
        timeStorageClassUpdated = CkJsonObject_stringOf(jsonResponse,"items[i].timeStorageClassUpdated");
        size = CkJsonObject_stringOf(jsonResponse,"items[i].size");
        md5Hash = CkJsonObject_stringOf(jsonResponse,"items[i].md5Hash");
        mediaLink = CkJsonObject_stringOf(jsonResponse,"items[i].mediaLink");
        crc32c = CkJsonObject_stringOf(jsonResponse,"items[i].crc32c");
        etag = CkJsonObject_stringOf(jsonResponse,"items[i].etag");
        i = i + 1;
    }



    CkRest_Dispose(rest);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jsonResponse);

    }

Sample JSON Response Body

{
  "kind": "storage#objects",
  "items": [
    {
      "kind": "storage#object",
      "id": "chilkat-bucket/hedgehogs.jpg/1540253106638630",
      "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket/o/hedgehogs.jpg",
      "name": "hedgehogs.jpg",
      "bucket": "chilkat-bucket",
      "generation": "1540253106638630",
      "metageneration": "1",
      "contentType": "image/jpeg",
      "timeCreated": "2018-10-23T00:05:06.638Z",
      "updated": "2018-10-23T00:05:06.638Z",
      "storageClass": "MULTI_REGIONAL",
      "timeStorageClassUpdated": "2018-10-23T00:05:06.638Z",
      "size": "48573",
      "md5Hash": "TE1U6fQlD6MOVGaQbwGinQ==",
      "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-bucket/o/hedgehogs.jpg?generation=1540253106638630&alt=media",
      "crc32c": "1B2d6g==",
      "etag": "CKaepPqhm94CEAE="
    },
    {
      "kind": "storage#object",
      "id": "chilkat-bucket/penguins.jpg/1540253106941673",
      "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket/o/penguins.jpg",
      "name": "penguins.jpg",
      "bucket": "chilkat-bucket",
      "generation": "1540253106941673",
      "metageneration": "1",
      "contentType": "image/jpeg",
      "timeCreated": "2018-10-23T00:05:06.941Z",
      "updated": "2018-10-23T00:05:06.941Z",
      "storageClass": "MULTI_REGIONAL",
      "timeStorageClassUpdated": "2018-10-23T00:05:06.941Z",
      "size": "777835",
      "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
      "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-bucket/o/penguins.jpg?generation=1540253106941673&alt=media",
      "crc32c": "ixxYVw==",
      "etag": "COndtvqhm94CEAE="
    },
    {
      "kind": "storage#object",
      "id": "chilkat-bucket/starfish.jpg/1540253106637454",
      "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket/o/starfish.jpg",
      "name": "starfish.jpg",
      "bucket": "chilkat-bucket",
      "generation": "1540253106637454",
      "metageneration": "1",
      "contentType": "image/jpeg",
      "timeCreated": "2018-10-23T00:05:06.636Z",
      "updated": "2018-10-23T00:05:06.636Z",
      "storageClass": "MULTI_REGIONAL",
      "timeStorageClassUpdated": "2018-10-23T00:05:06.636Z",
      "size": "6229",
      "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
      "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-bucket/o/starfish.jpg?generation=1540253106637454&alt=media",
      "crc32c": "9RjgwQ==",
      "etag": "CI6VpPqhm94CEAE="
    }
  ]
}