C++
C++
Get File Metadata
See more Google Drive Examples
Gets a file's metadata or content by ID.See Google Drive Files get for additional details.
Chilkat C++ Downloads
#include <CkAuthGoogle.h>
#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>
void ChilkatSample(void)
{
bool success = false;
success = true;
// It requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example uses a previously obtained access token having permission for the
// Google Drive scope.
CkAuthGoogle gAuth;
gAuth.put_AccessToken("GOOGLE-DRIVE-ACCESS-TOKEN");
CkRest rest;
// Connect using TLS.
// A single REST object, once connected, can be used for many Google Drive 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.
bool bAutoReconnect = true;
success = rest.Connect("www.googleapis.com",443,true,bAutoReconnect);
// Provide the authentication credentials (i.e. the access token)
rest.SetAuthGoogle(gAuth);
// ------------------------------------------------------------------------------
// We need to send a GET request like this:
// GET https://www.googleapis.com/drive/v3/files/fileId
// The fileId is part of the path.
CkStringBuilder sbPath;
sbPath.Append("/drive/v3/files/");
// Assume we previously obtained the fileId for the file of interest...
sbPath.Append("0B53Q6OSTWYolbUF6WS1Gei1oalk");
// Indicate that we want ALL possible fields.
// If no fields are indicated, then only the basic fields are returned.
const char *allFields = "appProperties,capabilities,contentHints,createdTime,description,explicitlyTrashed,fileExtension,folderColorRgb,fullFileExtension,headRevisionId,iconLink,id,imageMediaMetadata,isAppAuthorized,kind,lastModifyingUser,md5Checksum,mimeType,modifiedByMeTime,modifiedTime,name,originalFilename,ownedByMe,owners,parents,permissions,properties,quotaBytesUsed,shared,sharedWithMeTime,sharingUser,size,spaces,starred,thumbnailLink,trashed,version,videoMediaMetadata,viewedByMe,viewedByMeTime,viewersCanCopyContent,webContentLink,webViewLink,writersCanShare";
rest.AddQueryParam("fields",allFields);
const char *jsonResponse = rest.fullRequestNoBody("GET",sbPath.getAsString());
if (rest.get_LastMethodSuccess() != true) {
std::cout << rest.lastErrorText() << "\r\n";
return;
}
// A successful response will have a status code equal to 200.
if (rest.get_ResponseStatusCode() != 200) {
std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
std::cout << "response header: " << rest.responseHeader() << "\r\n";
std::cout << "response JSON: " << jsonResponse << "\r\n";
return;
}
// ---------------------------------------------------
// Sample code for parsing this JSON is shown below...
// ---------------------------------------------------
// A successful response looks like this:
// {
// "kind": "drive#file",
// "id": "0B53Q6OSTWYolbUF6WS1Gei1oalk",
// "name": "penguins.jpg",
// "mimeType": "image/jpeg",
// "starred": false,
// "trashed": false,
// "explicitlyTrashed": false,
// "parents": [
// "0B53Q6OSTWYola296ODZUSm5GYU0"
// ],
// "spaces": [
// "drive"
// ],
// "version": "672",
// "webContentLink": "https://docs.google.com/a/chilkatcloud.com/uc?id=0B53Q6OSTWYolbUF6WS1Gei1oalk&export=download",
// "webViewLink": "https://drive.google.com/a/chilkatcloud.com/file/d/0B53Q6OSTWYolbUF6WS1Gei1oalk/view?usp=drivesdk",
// "iconLink": "https://ssl.gstatic.com/docs/doclist/images/icon_11_image_list.png",
// "thumbnailLink": "https://lh5.googleusercontent.com/uIV1dJdc8vsAQzaaIInpc9AV55AcdHhpM7fQeI2RN2qbCSnhjK9IDdNQAOTtkvjS9ZObqw=s220",
// "viewedByMe": true,
// "viewedByMeTime": "2016-10-08T12:38:02.258Z",
// "createdTime": "2016-10-08T12:38:02.258Z",
// "modifiedTime": "2016-10-08T12:38:02.258Z",
// "modifiedByMeTime": "2016-10-08T12:38:02.258Z",
// "owners": [
// {
// "kind": "drive#user",
// "displayName": "Matthew Smith",
// "me": true,
// "permissionId": "08366696655122259092",
// "emailAddress": "support@chilkatcloud.com"
// }
// ],
// "lastModifyingUser": {
// "kind": "drive#user",
// "displayName": "Matthew Smith",
// "me": true,
// "permissionId": "08366696655122259092",
// "emailAddress": "support@chilkatcloud.com"
// },
// "shared": false,
// "ownedByMe": true,
// "capabilities": {
// "canEdit": true,
// "canComment": true,
// "canShare": true,
// "canCopy": true,
// "canReadRevisions": true
// },
// "viewersCanCopyContent": true,
// "writersCanShare": true,
// "permissions": [
// {
// "kind": "drive#permission",
// "id": "08366696655122259092",
// "type": "user",
// "emailAddress": "support@chilkatcloud.com",
// "role": "owner",
// "displayName": "Matthew Smith"
// }
// ],
// "originalFilename": "penguins.jpg",
// "fullFileExtension": "jpg",
// "fileExtension": "jpg",
// "md5Checksum": "9d377b10ce778c4938b3c7e2c63a229a",
// "size": "777835",
// "quotaBytesUsed": "777835",
// "headRevisionId": "0B53Q6OSTWYolUUlHVFhHdFlXQ0R1aHZuT0tORTVzc2h5NnZjPQ",
// "imageMediaMetadata": {
// "width": 1024,
// "height": 768,
// "rotation": 0,
// "time": "2009:03:12 13:48:35"
// },
// "isAppAuthorized": false
// }
// Iterate over each file in the response and show the name, id, and mimeType.
CkJsonObject json;
json.Load(jsonResponse);
// Show the full JSON response.
json.put_EmitCompact(false);
std::cout << json.emit() << "\r\n";
std::cout << "-" << "\r\n";
// Demonstrate how to get pieces of information:
std::cout << "Original Filename: " << json.stringOf("originalFilename") << "\r\n";
bool wasLastModifiedUserMe = json.BoolOf("lastModifyingUser.me");
std::cout << "Was Last Modified by Me: " << wasLastModifiedUserMe << "\r\n";
// Assuming this is an image file...
int width = json.IntOf("imageMediaMetadata.width");
std::cout << "Image Width: " << width << "\r\n";
// Iterate over parents...
int i;
int numParents = json.SizeOfArray("parents");
i = 0;
while (i < numParents) {
json.put_I(i);
std::cout << "Parent " << i << ": " << json.stringOf("parents[i]") << "\r\n";
i = i + 1;
}
// Iterate over owners...
int numOwners = json.SizeOfArray("owners");
i = 0;
while (i < numOwners) {
json.put_I(i);
std::cout << "Owner " << i << ": kind=" << json.stringOf("owners[i].kind") << " displayName=" << json.stringOf("owners[i].displayName") << "\r\n";
i = i + 1;
}
// Iterate over permissions...
int numPermissions = json.SizeOfArray("permissions");
i = 0;
while (i < numPermissions) {
json.put_I(i);
std::cout << "Permission " << i << ": kind=" << json.stringOf("permissions[i].kind") << " id=" << json.stringOf("permissions[i].id") << "\r\n";
i = i + 1;
}
}