PROSAGA码农传奇-云数据库Trove-云存储服务，什么，如何以及哪些？

0# 我头上有犄角 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”>
  <P>
    迟到的回应，但这可能有助于其他人解决这个问题。此代码将视频上传到GCS（已测试并正常工作）
  </p>
  <H2>
    首先验证
  </H2>
  <P>
    这将弹出Google身份验证视图控制器（您必须将“GTMOAuth2ViewTouch.xib”文件添加到您的项目中）。
  </p>
   <pre>
    <code>
      - (void) uploadVideoToGoogleCloud {

// declare this
//@property (strong, nonatomic) GTLServiceStorage* serviceStorage;
//@property (strong, nonatomic) NSString* accessToken;

_serviceStorage = [[GTLServiceStorage alloc] init];
_serviceStorage = [GTLServiceStorage new];
_serviceStorage.additionalHTTPHeaders = @{@"x-goog-project-id": @"yourGoogleProjectId"};

// authenticate
GTMOAuth2ViewControllerTouch *oAuthVC =
[[GTMOAuth2ViewControllerTouch alloc] initWithScope:kGTLAuthScopeStorageDevstorageReadWrite
                                           clientID:@"yourClientId from Client ID for iOS application"
                                       clientSecret:@"yourSecret from Client ID for iOS application"
                                   keychainItemName:@"use nil or give a name to save in keychain"
                                  completionHandler:^(GTMOAuth2ViewControllerTouch *viewController, GTMOAuth2Authentication *auth, NSError *error) {

_accessToken = [NSString stringWithFormat:@"Bearer %@", [auth.parameters objectForKey:@"access_token"]];

_serviceStorage.additionalHTTPHeaders = @{@"x-goog-project-id": kProjectID, @"Content-Type": @"application/json-rpc", @"Accept": @"application/json-rpc", @"Authorization": _accessToken};

_serviceStorage.authorizer = auth;

dispatch_async(dispatch_get_main_queue(), ^{
                                          [self dismissViewControllerAnimated:YES completion:nil];
                                      });
                                  }];

dispatch_async(dispatch_get_main_queue(), ^{
    [self presentViewController:oAuthVC animated:YES completion:nil];
});
}

</code>
  </pre>
  <H2>
    验证后上传视频
  </H2>
  <P>
    用户成功通过身份验证后，请将其调用以上传视频
  </p>
   <pre>
    <code>
      // upload video file
NSString *filename = @"yourVideoFileNameNoExtension";
NSString *pathToMovie = [[NSBundle mainBundle] pathForResource:filename ofType:@".mp4"];
NSFileHandle *fileHandle = [NSFileHandle fileHandleForReadingAtPath:pathToMovie];
if (fileHandle) {

GTLUploadParameters *uploadParam =
    [GTLUploadParameters uploadParametersWithFileHandle:fileHandle MIMEType:@"video/mp4"];

GTLStorageObject *storageObj = [GTLStorageObject object];
    storageObj.name = @"thisWillAppearOnTheBucketAsTheFilename";

GTLQueryStorage *query = [GTLQueryStorage queryForObjectsInsertWithObject:storageObj bucket:@"your-bucket-name" uploadParameters:uploadParam];

GTLServiceTicket *ticket = [_serviceStorage executeQuery:query completionHandler:^(GTLServiceTicket *ticket, id object, NSError *error) {
        NSLog(@"error:%@", error ? [error description] : @"query succeeded!");
    }];

ticket.uploadProgressBlock = ^(GTLServiceTicket *ticket,
                                   unsigned long long numberOfBytesRead,
                                   unsigned long long dataLength) {
        NSLog(@"ticket: %@", ticket);
        NSLog(@"read %llu from %llu bytes", numberOfBytesRead, dataLength);
    };

} else {
    NSLog(@"no video file handle!");
}

</code>
  </pre>
  <P>
    希望这可以帮助 ：）
  </p>
</DIV>

1# 筱梨 | 2019-08-31 10-32

2# 听风～ | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”>
  <P>
    实际上，Google服务的Objective-C包装器库在这里有非常详细的文档：

<a href="https://code.google.com/p/google-api-objectivec-client/wiki/Introduction#Preparing_to_Use_the_Library" rel="noreferrer">
      https://code.google.com/p/google-api-objectivec-client/wiki/Introduction#Preparing_to_Use_the_Library
    </A>
  </p>
  <P>
    它告诉您这个包装器库是基于底层JSON API自动生成的。因此，所有GTLStorage ...类都将模仿Google Storage的JSON API。执行实际API调用的类是GTLQueryStorage。
  </p>
  <P>
    如果查看该JSON文档，您会发现有一个用于将数据存储到存储桶中的对象：
    <a href="https://developers.google.com/storage/docs/json_api/v1/#Objects" rel="noreferrer">
      https://developers.google.com/storage/docs/json_api/v1/#Objects
    </A>
    
上传新对象的方法是“插入”
  </p>
  <P>
    回到GTLQueryStorage.h文件，您将找到相应的Objective-C方法将新对象插入到存储桶中：

</p>
   <pre>
    <code>
      // Method: storage.objects.insert
// Stores new data blobs and associated metadata.
//  Required:
//   bucket: Name of the bucket in which to store the new object. Overrides the
//     provided object metadata's bucket value, if any.
//  Optional:
//   ifGenerationMatch: Makes the operation conditional on whether the object's
//     current generation matches the given value.
//   ifGenerationNotMatch: Makes the operation conditional on whether the
//     object's current generation does not match the given value.
//   ifMetagenerationMatch: Makes the operation conditional on whether the
//     object's current metageneration matches the given value.
//   ifMetagenerationNotMatch: Makes the operation conditional on whether the 
//     object's current metageneration does not match the given value.
//   name: Name of the object. Required when the object metadata is not
//     otherwise provided. Overrides the object metadata's name value, if any.
//   projection: Set of properties to return. Defaults to noAcl, unless the
//     object resource specifies the acl property, when it defaults to full.
//      kGTLStorageProjectionFull: Include all properties.
//      kGTLStorageProjectionNoAcl: Omit the acl property.
//  Upload Parameters:
//   Accepted MIME type(s): */*
//  Authorization scope(s):
//   kGTLAuthScopeStorageDevstorageFullControl
//   kGTLAuthScopeStorageDevstorageReadWrite
// Fetches a GTLStorageObject.
+ (id)queryForObjectsInsertWithObject:(GTLStorageObject *)object
                           bucket:(NSString *)bucket
                 uploadParameters:(GTLUploadParameters *)uploadParametersOrNil;

</code>
  </pre>
  <P>
    所以你应该：
  </p>
  <UL>
    <LI>
      分配GTLServiceStorage的实例
    </LI>
    <LI>
      将API密钥设置为该对象
    </LI>
    <LI>
      使用上面的类方法为要使用正确存储桶保存的对象实例化GTLQueryStorage对象
    </LI>
    <LI>
      创建一个服务票据，它执行查询并获得一个完成处理程序来处理完成（成功，错误情况）。
    </LI>
  </UL>
</DIV>