Indy 10分段上传到OneDrive错误

Question

我试图做Multipart upload to OneDrive using POST并得到'HTTP/1.1 400错误请求'。 IdLogFile：

 
Stat Connected. 
Sent 10.02.2017 12:50:08: POST /v1.0/drive/root::/children HTTP/1.0`<EOL>`Content-Type: multipart/related; boundary="Boundary"`<EOL>`Content-Length: 254`<EOL>`Authorization: Bearer EwA...%3d`<EOL>`Host: api.onedrive.com`<EOL>`Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8`<EOL>`Accept-Encoding: identity`<EOL>`User-Agent: Mozilla/3.0 (compatible; Indy Library)`<EOL><EOL>` 
Sent 10.02.2017 12:50:08: --Boundary`<EOL>`Content-ID: <metadata>`<EOL>`Content-Type: application/json`<EOL>`{"name":"Dest.txt", "file":{}, "@content.sourceUrl":"cid:content"}`<EOL>`--Boundary`<EOL>`Content-ID: <content><EOL>Content-Type: application/octet-stream<SourceContent>--Boundary-- 
Recv 10.02.2017 12:50:08: H 
Recv 10.02.2017 12:50:08: TTP/1.1 400 Bad Request`<EOL>`Via: 1.1 DM5SCH102210409 (wls-colorado)`<EOL>`Content-Length: 60`<EOL>`Content-Type: application/json`<EOL>`Server: Microsoft-IIS/8.5`<EOL>`P3P: CP="BUS CUR CONo FIN IVDo ONL OUR PHY SAMo TELo"`<EOL>`X-WLSPROXY: DM5SCH102210409`<EOL>`X-MSNSERVER: DM5SCH102231823`<EOL>`Strict-Transport-Security: max-age=31536000; includeSubDomains`<EOL>`X-QosStats: {"ApiId":0,"ResultType":2,"SourcePropertyId":0,"TargetPropertyId":42}`<EOL>`X-ThrowSite: 1479.b891`<EOL>`X-AsmVersion: UNKNOWN; 16.0.0.0`<EOL>`X-MSEdge-Ref: Ref A: A9918FA26FAF469EB3797E9DAEA3172E Ref B: FRAEDGE0409 Ref C: Fri Feb 10 01:50:09 2017 PST`<EOL>`Date: Fri, 10 Feb 2017 09:50:09 GMT`<EOL>`Connection: close`<EOL><EOL>`{"error":{"code":"invalidRequest","message":"Bad Argument"}} 
Stat Disconnected. 

代码：

procedure TSaveFilter.UploadTest; 
const 
    URL = 'https://api.onedrive.com/v1.0/drive/root::/children'; 
    Boundary = 'Boundary'; 
var 
    IdHTTP: TIdHTTP; 
    MemoryStream: TMemoryStream; 
    FileStream: TFileStream; 

    procedure WriteLnString(str: AnsiString; CRLF: Boolean = True); 
    begin 
    if CRLF then str := str + #13#10; 
    MemoryStream.Write(str[1], Length(str)); 
    end; 
begin 
    IdHTTP := TIdHTTP.Create(nil); 
    try 
    IdHTTP.HandleRedirects := True; 
    IdHTTP.IOHandler := TIdSSLIOHandlerSocketOpenSSL.Create(IdHTTP); 
    IdHTTP.Request.BasicAuthentication := False; 
    IdHTTP.Request.CustomHeaders.Values['Authorization'] := 'Bearer ' + FAccessToken; 
    IdHTTP.Request.ContentType := Format('multipart/related; boundary="%s"', [Boundary]); 

    MemoryStream := TMemoryStream.Create; 
    try 
     WriteLnString('--' + Boundary); 
     WriteLnString('Content-ID: <metadata>'); 
     WriteLnString('Content-Type: application/json'); 
     WriteLnString('{"name":"Dest.txt", "file":{}, "@content.sourceUrl":"cid:content"}'); 
     WriteLnString('--' + Boundary); 
     WriteLnString('Content-ID: <content>'); 
     WriteLnString('Content-Type: application/octet-stream', False); 
     FileStream := TFileStream.Create('Source.txt', fmOpenRead); 
     try 
     MemoryStream.CopyFrom(FileStream, FileStream.Size); 
     finally 
     FileStream.Free; 
     end; 
     WriteLnString('--' + Boundary + '--', False); 
     IdHTTP.Post(URL, MemoryStream); 
    finally 
     MemoryStream.Free; 
    end; 
    finally 
    IdHTTP.Free; 
    end; 
end; 

我在做什么错？

这是一个工作请求（名单小孩）：

 
Stat Connected. 
Sent 10.02.2017 20:52:42: GET /v1.0/drive/root::/children?select=name,folder,file HTTP/1.1`<EOL>`Authorization: Bearer EwA...%3d`<EOL>`Host: api.onedrive.com`<EOL>`Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8`<EOL>`Accept-Encoding: identity`<EOL>`User-Agent: Mozilla/3.0 (compatible; Indy Library)`<EOL>``<EOL>` 
Recv 10.02.2017 20:52:43: H 
Recv 10.02.2017 20:52:43: TTP/1.1 200 OK`<EOL>`Via: 1.1 BN2BAP4ED8CB55D (wls-colorado)`<EOL>`Content-Length: 213`<EOL>`Content-Type: application/json; odata.metadata=minimal`<EOL>`Server: Microsoft-IIS/8.5`<EOL>`P3P: CP="BUS CUR CONo FIN IVDo ONL OUR PHY SAMo TELo"`<EOL>`X-WLSPROXY: BN2BAP4ED8CB55D``X-MSNSERVER: DM5SCH102231619`<EOL>`Strict-Transport-Security: max-age=31536000; includeSubDomains`<EOL>`OData-Version: 4.0`<EOL>`X-AsmVersion: UNKNOWN; 16.0.0.0`<EOL>`X-MSEdge-Ref: Ref A: ECB06A4BE05B478AB36611C892C36CC7 Ref B: AM1EDGE0419 Ref C: Fri Feb 10 09:52:43 2017 PST``Date: Fri, 10 Feb 2017 17:52:43 GMT`<EOL>``<EOL>`{"@odata.context":"https://api.onedrive.com/v1.0/$metadata#drives('me')/items('root')/children(name,folder,file)","value":[{"name":"AB","folder":{"childCount":7}},{"name":"ArecaBackup","folder":{"childCount":6}}]} 
Stat Disconnected. 

Answer 1

你的MIME数据是畸形的，这就是为什么服务器拒绝它。

这是您要发送的请求：

 
POST /v1.0/drive/root::/children HTTP/1.0 
Content-Type: multipart/related; boundary="Boundary" 
Content-Length: 254 
Authorization: Bearer EwA...%3d 
Host: api.onedrive.com 
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 
Accept-Encoding: identity 
User-Agent: Mozilla/3.0 (compatible; Indy Library) 

--Boundary 
Content-ID: <metadata> 
Content-Type: application/json 
{"name":"Dest.txt", "file":{}, "@content.sourceUrl":"cid:content"} 
--Boundary 
Content-ID: <content> 
Content-Type: application/octet-stream<SourceContent>--Boundary-- 

正如你所看到的，MIME数据是全乱了。具体而言，每个MIME字段缺少一些必需的CRLF。就像使用HTTP标头和正文一样，MIME标头和正文之间用<CRLF><CRLF>序列分开，并且在TFileStream数据和它后面的MIME边界之间需要有CRLF。

请求需要看起来更像这个：

 
POST /v1.0/drive/root::/children HTTP/1.0 
Content-Type: multipart/related; boundary="Boundary" 
Content-Length: 260 
Authorization: Bearer EwA...%3d 
Host: api.onedrive.com 
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 
Accept-Encoding: identity 
User-Agent: Mozilla/3.0 (compatible; Indy Library) 

--Boundary 
Content-ID: <metadata> 
Content-Type: application/json 

{"name":"Dest.txt", "file":{}, "@content.sourceUrl":"cid:content"} 
--Boundary 
Content-ID: <content> 
Content-Type: application/octet-stream 

<SourceContent> 
--Boundary-- 

试试这个代码来填充TMemoryStream：

MemoryStream := TMemoryStream.Create; 
try 
    WriteLnString('--' + Boundary); 
    WriteLnString('Content-ID: <metadata>'); 
    WriteLnString('Content-Type: application/json'); 
    WriteLnString(''); // <-- ADD THIS!!! 
    WriteLnString('{"name":"Dest.txt", "file":{}, "@content.sourceUrl":"cid:content"}'); 
    WriteLnString('--' + Boundary); 
    WriteLnString('Content-ID: <content>'); 
    WriteLnString('Content-Type: application/octet-stream'); // <-- REMOVE THE FALSE!!! 
    WriteLnString(''); // <-- ADD THIS!!! 

    FileStream := TFileStream.Create('Source.txt', fmOpenRead); 
    try 
    MemoryStream.CopyFrom(FileStream, 0); 
    finally 
    FileStream.Free; 
    end; 

    WriteLnString(''); // <!-- ADD THIS!!! 
    WriteLnString('--' + Boundary + '--', False); 
    ... 
finally 
    MemoryStream.Free; 
end; 

话虽这么说，印有通常与使用TIdMultipartFormDataStream类TIdHTTP当发送multipart/form-data职位。 OneDrive不支持multipart/form-data，但什么是奇怪的是，OneDrive的文件明确规定以下，仅适用于multipart/form-data而不是multipart/related：如果包含两个以上的部分

的请求将被拒绝。 每个零件必须在Content-Disposition标题中指定一个name值，指示它是哪一部分。部件可以按任何顺序排列，但应首先指定元数据部分。

然而，同一文档中给出的例子是使用multipart/related，就像你的代码。在Microsoft/OneDrive论坛和各种博客中讨论了在上传到OneDrive时是否使用multipart/form-data或multipart/related。 OneDrive员工确实证实了这个问题，他们最终需要一些工作。

万一OneDrive永远支持multipart/form-data，这里使用TIdMultipartFormDataStream一个例子：

procedure TSaveFilter.UploadTest; 
const 
    URL = 'https://api.onedrive.com/v1.0/drive/root::/children'; 
var 
    IdHTTP: TIdHTTP; 
    PostData: TIdMultipartFormDataStream; 
begin 
    IdHTTP := TIdHTTP.Create(nil); 
    try 
    IdHTTP.HandleRedirects := True; 
    IdHTTP.IOHandler := TIdSSLIOHandlerSocketOpenSSL.Create(IdHTTP); 
    IdHTTP.Request.BasicAuthentication := False; 
    IdHTTP.Request.CustomHeaders.Values['Authorization'] := 'Bearer ' + FAccessToken; 

    PostData := TIdMultipartFormDataStream.Create; 
    try 
     PostData.AddFormField('metadata', '{"name":"Dest.txt", "file":{}}', 'utf-8', 'application/json'); 
     PostData.AddFile('content', 'Source.txt', 'application/octet-stream').FileName := ''; 
     IdHTTP.Post(URL, PostData); 
    finally 
     PostData.Free; 
    end; 
    finally 
    IdHTTP.Free; 
    end; 
end;