我正在使用Apache HttpClient将我的Android项目从Retrofit迁移到OkHttp。即使应用程序自定义标头相同且两个请求的Content-Length相等，POST / PUT请求也会返回错误。
Http Error 400 Bad Request - Invalid Header。即使作为参考，服务器是使用ASP.NET上的Windows Azure实现的。
Apache HttpClient：
HttpPut put = new HttpPut(<URL>);
StringEntity se = new StringEntity(json);
se.setContentEncoding("UTF-8");
se.setContentType("application/json");
put.setEntity(se);
response = client.execute(put);
改造+ OkHttp：
// API
@PUT("/<path>")
Response updateThing(@Body Dto dto);
// OkHttpClient
@Override
public Response execute(Request r) throws IOException {
List<Header> headers = HttpHelper.headerFor(method, url, etc);
// Create new request with required headers
Request encodedRequest = new Request(method, url, headers, r.getBody());
return super.execute(encodedRequest);
}
服务器返回：
---> HTTP PUT https://example.com/path
Content-Type: application/json; charset=UTF-8
Content-Length: 53
{"user_id":"0","latitude":"0.0","longitude":"0.0"}
---> END HTTP (53-byte body)
PUT https://example.com/path
Authorization Basic bmfweEskWkvlabF0ZSQ=
Content-Type application/json
Accept application/json
HashKey 8eb93b898ddc2b74685ed2be64c76cc3af973ebc6b628781fe50eedcbe29376f
<--- HTTP 400 https://example.com/path (1397ms)
: HTTP/1.1 400 Bad Request
Connection: close
Content-Length: 339
Content-Type: text/html; charset=us-ascii
Date: Sat, 04 Jan 2014 08:26:45 GMT
OkHttp-Received-Millis: 1388824004870
OkHttp-Response-Source: NETWORK 400
OkHttp-Selected-Transport: http/1.1
OkHttp-Sent-Millis: 1388824004785
Server: Microsoft-HTTPAPI/2.0
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd">
<HTML><HEAD><TITLE>Bad Request</TITLE>
<META HTTP-EQUIV="Content-Type" Content="text/html; charset=us-ascii"></HEAD>
<BODY><h2>Bad Request - Invalid Header</h2>
<hr><p>HTTP Error 400. The request has an invalid header name.</p>
</BODY></HTML>
<--- END HTTP (339-byte body)
编辑：
不确定服务器期望什么作为标头参数，但您可以在客户端界面上传递任何标头值
@PUT("/<path>")
Response updateThing(@Header("headerName") String headerName, @Body Dto dto);