我正在尝试使用此xquery脚本从我的本地Marklogic服务器发送多部分发布请求：
xquery version "1.0-ml";
let $uri := "http://uri_to_service"
let $data :=
'------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="projectId"
1DBC9DEE-6B5D-0001-D76C-13F516502B00
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="language"
de
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="file"; filename="test.txt"
Content-Type: text/plain
Das ist ein Test.
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="submit"
Submit
------WebKitFormBoundaryq3PKI0zfbTv08rDu--
'
let $options :=
<options xmlns="xdmp:http">
<authentication method="basic">
<username>abc</username>
<password>123</password>
</authentication>
<data>{$data}</data>
<headers>
<Connection>keep-alive</Connection>
<Cache-Control>max-age=0</Cache-Control>
<Accept>text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8</Accept>
<Origin>null</Origin>
<User-Agent>Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36</User-Agent>
<Content-Type>multipart/form-data; boundary=----WebKitFormBoundaryq3PKI0zfbTv08rDu</Content-Type>
<Accept-Encoding>gzip,deflate,sdch</Accept-Encoding>
<Accept-Language>en-US,en;q=0.8,de;q=0.6</Accept-Language>
</headers>
</options>
return
xdmp:http-post($uri, $options)
在Wireshark中，我看到以下传出请求：
POST /api/extract HTTP/1.1
Connection: keep-alive
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: null
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryq3PKI0zfbTv08rDu
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8,de;q=0.6
From: admin@marcos-macbook-pro.local
Host: some_service_uri
Content-Length: 509
Authorization: Basic some_basic_code
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="projectId"
1DBC9DEE-6B5D-0001-D76C-13F516502B00
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="language"
de
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="file"; filename="test.txt"
Content-Type: text/plain
Das ist ein Test.
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="submit"
Submit
------WebKitFormBoundaryq3PKI0zfbTv08rDu--
HTTP/1.1 400 Bad Request
Server: nginx/1.6.1
Date: Fri, 22 Aug 2014 14:18:47 GMT
Content-Type: text/html;charset=utf-8
Content-Length: 1246
Connection: keep-alive
Set-Cookie: JSESSIONID=B677A4E57DB4E8E8076EB4C9DD3E0AF4; Path=/extractor
<html><head><title>Apache Tomcat/6.0.36 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 400 - Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadException: Stream ended unexpectedly</h1><HR size="1" noshade="noshade"><p><b>type</b> Status report</p><p><b>message</b> <u>Could not parse multipart servlet request; nested exception is org.apache.commons.fileupload.FileUploadException: Stream ended unexpectedly</u></p><p><b>description</b> <u>The request sent by the client was syntactically incorrect.</u></p><HR size="1" noshade="noshade"><h3>Apache Tomcat/6.0.36</h3></body></html>
如您所见，请求因某种原因失败。
然后我用一个小的html表单从Chrome浏览器尝试了相同的请求。
<html>
<head>
<title>Test Form</title>
</head>
<body>
<form action="service_uri" method="post" enctype="multipart/form-data">
<input type="text" name="projectId" value="1DBC9DEE-6B5D-0001-D76C-13F516502B00">
<input type="text" name="language" value="de">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>
</body>
</html>
浏览器要求我输入用户名/密码，一切顺利。
在Wireshark中我可以看到：
POST /api/extract HTTP/1.1
Host: some_service_uri
Connection: keep-alive
Content-Length: 527
Cache-Control: max-age=0
Authorization: Basic some_basic_code
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: null
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.143 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryq3PKI0zfbTv08rDu
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8,de;q=0.6
Cookie: JSESSIONID=469591D4A83F24BB77547B6C235F25B7
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="projectId"
1DBC9DEE-6B5D-0001-D76C-13F516502B00
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="language"
de
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="file"; filename="test.txt"
Content-Type: text/plain
Das ist ein Test.
------WebKitFormBoundaryq3PKI0zfbTv08rDu
Content-Disposition: form-data; name="submit"
Submit
------WebKitFormBoundaryq3PKI0zfbTv08rDu--
HTTP/1.1 200 OK
Server: nginx/1.6.1
Date: Fri, 22 Aug 2014 13:38:04 GMT
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
80
{"text":"Das ist ein Test.\n","metadata":{},"document":{"freeTerms":[{"textValue":"test","score":100,"frequencyInDocument":1}]}}
0
为什么我的请求在从Marklogic发送时失败了？根据传出请求（由Wireshark捕获），除Content-Length外，我发现没有区别。
发生了什么事？或者可能是什么原因？编码会改变内容长度吗？
答案 0 :(得分：1)
服务器错误是Stream ended unexpectedly，所以内容长度似乎是一个很好的候选人：527对509。
您是否尝试过此库，而不是编写自己的多部分代码？ https://github.com/ableasdale/consultant-tools/blob/da92815e1322fe8e479ba2ba3741857670498c2a/src/main/resources/modules/example/lib-multipart-post.xqy