【发布时间】：2017-02-16 18:13:37
【问题描述】：
我正在使用 MultiPartUtility 在 Android 中请求 Web 服务，发送的请求是：
POST / HTTP/1.1
connection: Keep-Alive
enctype: multipart/form-data
content-type: multipart/form-data;charset=UTF-8;boundary=--===1487292689114===
accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
accept-encoding: gzip, deflate, br
accept-language: es-419,es;q=0.8,en-GB;q=0.6,en;q=0.4
cache-control: max-age=0
upgrade-insecure-requests: 1
user-agent: Dalvik/1.6.0 (Linux; U; Android 4.4.4; 5042A Build/KTU84P)
host: 192.168.10.171:8080
content-length: 990
payload: ----===1487292689114===
Content-Disposition: form-data; name="new_id"
171
----===1487292689114===
Content-Disposition: form-data; name="file"; filename="IMG_20170216_195118.jpg"
Content-Type: image/jpeg
Content-Transfer-Encoding: binary
����
(
----===1487292689114===--
这是服务：
@POST
@Path("/reportNewImage")
@Consumes(MediaType.MULTIPART_FORM_DATA+"; charset=UTF-8")
@Produces(MediaType.TEXT_PLAIN)
public Response setImage(
@FormDataParam("new_id") String new_id,
@FormDataParam("file") InputStream uploadedInputStream,
@FormDataParam("file") FormDataContentDisposition fileDetail, @Context HttpHeaders headers) {
...
}
但是当从 java android 代码建立连接时，我得到了相同的 error 400 Bad Requesting。当我从 html 表单建立连接时，结果是成功的。请帮助我，可能是什么原因？
编辑：
使用 html 表单提出的请求：
POST / HTTP/1.1
Host: example.com
Connection: keep-alive
Content-Length: 6564
Cache-Control: max-age=0
Origin: http://localhost
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/55.0.2883.87 Chrome/55.0.2883.87 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryNt8QJSIDDDgznij8
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Referer: http://localhost/form.html
Accept-Encoding: gzip, deflate, br
Accept-Language: es-419,es;q=0.8,en-GB;q=0.6,en;q=0.4
------WebKitFormBoundaryNt8QJSIDDDgznij8
Content-Disposition: form-data; name="new_id"
109
------WebKitFormBoundaryNt8QJSIDDDgznij8
Content-Disposition: form-data; name="file"; filename="apple.jpg"
Content-Type: image/jpeg
����JFIFHH��C
...
�������1s�����K�"T�I)���ti6>�d
����
------WebKitFormBoundaryNt8QJSIDDDgznij8--
这是 Android 的 httpURLConnection：
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setRequestMethod("POST");
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
writer.flush();
writer.close();
// checks server's status code first
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
response.append(line);
}
reader.close();
httpConn.disconnect();
} else {
throw new IOException("Server returned non-OK status: " + status);
}
编辑 2：
我发现只有编译这一行时才会出现错误：
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
否则错误代码为 415，因为没有定义 Content-Type 标头。
【问题讨论】：
-
它还说了什么？请求错误且没有更多详细信息？
-
可以在服务器端设置断点吗？
-
@efekctive 我在 JAX-RS 中设置了一个过滤器，以便在处理 servlet 之前打印标题和有效负载，但我无法获得更多信息，因为 servlet 立即拒绝了请求。你想要什么信息？
-
你能在 servlet 处理之前比较这两个请求吗？
-
当然，看看版本。我已经尝试添加标题但仍然无法正常工作。只是Referer和Origin没有添加到java android HttpURLConnection请求中。
标签： java android jax-rs multipartform-data