如何在iOS下载谷歌驱动V3 API的pdf？ [英] How to download pdf from google drive V3 API in IOS?

问题描述

使用 Google Drive V3 API 下载文件和pdf。

1. 按照Google Doc的说法，下面的Google Drive V3 Api是下载文件（比如文本文件）的网址。
   $ b

   NSString * url = [NSString stringWithFormat：@https://www.googleapis.com/drive/v3/files/%@?alt=media，file.identifier];

然而，当我简单地使用这个URL时，它给我在下载文件时出错，然后我用Client ID和它的工作正常尝试了这样的事情。在这里，我删除了alt = media，并在url中添加了客户端id。它完全正常工作）.Below是修改过的url。

pre $ `NSString * url = [NSStringstringWithFormat：@https://www.googleapis.com/drive/v3/files/%@?key=%@，file.identifier，kClientID];`

2. 现在，他们在Google Doc中提到要使用pdf以下网址。

   
   
   

   NSString * url = [NSString stringWithForm at：https://www.googleapis.com/drive/v3/files/%@/export?alt=media&mimeType=application/pdf，file.identifier];

再次im面临同样的问题..上面的网址下载PDF给我的错误。我做了所有的

*** Doc中提供的示例代码使用的是谷歌驱动器V2 Api。

那么，如何使用Google Drive V3 API下载PDF？请大家帮忙。

今天，我成功从Google Drive V3 Api下载文件。

  self.fileSize = [loadFile.quotaBytesUsed unsignedIntegerValue]; 
 
 ////////////////////////////////////////// ////////////////////////////////////////////////// //////// 
 GTMSessionFetcher * fetcher = [GTMSessionFetcher fetcherWithURLString：loadFile.webContentLink]; 
 if（fetcher == nil）
 {
 break; 
} 
 
 fetcher.authorizer = [GTLServiceDrive sharedServiceDrive] .authorizer; 
 fetcher.destinationFileURL = [NSURL fileURLWithPath：self.intoPath]; 
 
 __block typeof（self）blockSelf = self; 
 fetcher.downloadProgressBlock = ^（int64_t bytesWritten，int64_t totalBytesWritten，int64_t totalBytesExpectedToWrite）{
 //获取下载进度
}; 
 
 ////////////////////////////////////////// ////////////////////////////////////////////////// //////// 
 [fetcher beginFetchWithDelegate：self didFinishSelector：@selector（fetcher：finishedWithData：error :)]; 
  

Working with the Google Drive V3 API to download files and pdf.

1. As per Google Doc, Google Drive V3 Api below is the Url to download files(say text file).

   NSString *url = [NSString stringWithFormat:@"https://www.googleapis.com/drive/v3/files/%@?alt=media",file.identifier];

However when i simply used this url, it gives me error while downloading files then i tried something like this with Client ID and its working fine.(here i removed alt=media and added client id in the url.Which is perfectly working fine).Below is the modified url.

`NSString *url = [NSStringstringWithFormat:@"https://www.googleapis.com/drive/v3/files/%@?key=%@", file.identifier,kClientID];`

2. Now for pdf they have mentioned in the Google Doc to use the below url.

   NSString *url = [NSString stringWithFormat:@"https://www.googleapis.com/drive/v3/files/%@/export?alt=media&mimeType=application/pdf", file.identifier];

Again i m facing the same problem..the above url for downloading the pdf giving me the error.i have done all the permutation and combination with the url with no success.

***The Sample code provided in the Doc is using google drive V2 Api.

So,How to download pdf with the use of Google Drive V3 Api?Please help.

解决方案

Today, I success for download file from Google Drive V3 Api.

self.fileSize = [loadFile.quotaBytesUsed unsignedIntegerValue];

        ////////////////////////////////////////////////////////////////////////////////////////////////////
        GTMSessionFetcher *fetcher = [GTMSessionFetcher fetcherWithURLString:loadFile.webContentLink];
        if(fetcher==nil)
        {
            break;
        }

        fetcher.authorizer             = [GTLServiceDrive sharedServiceDrive].authorizer;
        fetcher.destinationFileURL     = [NSURL fileURLWithPath:self.intoPath];

        __block typeof(self) blockSelf = self;
        fetcher.downloadProgressBlock  = ^(int64_t bytesWritten, int64_t totalBytesWritten, int64_t totalBytesExpectedToWrite) {
            //get download progress
        };

        ////////////////////////////////////////////////////////////////////////////////////////////////////
        [fetcher beginFetchWithDelegate:self didFinishSelector:@selector(fetcher:finishedWithData:error:)];

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