正文
.net core web api 获取request body的纯文本
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本文代码
https://github.com/wuhaibo/readPlainTextDotNetCoreWepApi
总有些时候我们希望获得Request body 的纯文本 那么怎么做呢？很简单。如下所示
public string GetJsonString([FromBody]string content)
{
return "content: " + content ;
}
测试结果如下
request：
POST http://localhost:5000/api/values/GetJsonString HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/json
Content-Length:
Host: localhost:
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1. (java 1.5)
"test"response：
HTTP/1.1 OK
Date: Wed, Mar :: GMT
Content-Type: text/plain; charset=utf-
Server: Kestrel
Transfer-Encoding: chunkedcontent: test
可以看到content被赋值test。 但有个问题request body的内容必须是合法的json而且request 的media type也得是json
举个例子，
request：
POST http://localhost:5000/api/values/GetJsonString HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/xml
Content-Length:
Host: localhost:
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1. (java 1.5)
testresponse：
HTTP/1.1 OK
Date: Wed, Mar :: GMT
Content-Type: text/plain; charset=utf-
Server: Kestrel
Transfer-Encoding: chunkedcontent:
可以看到由于request body的内容 test 并不是个合法的xml，所以我们返回的content是空。
有个更好的方法 如下所示，这种方法不论是media type都可以获得request body 的纯文本
public string GetJsonString3(string content)
{
var reader = new StreamReader(Request.Body);
var contentFromBody = reader.ReadToEnd();
return "content: " + content
+ " contentFromBody: " + contentFromBody;
}
测试结果
request：
POST http://localhost:5000/api/values/GetJsonString3 HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/xml
Content-Length:
Host: localhost:
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1. (java 1.5)
testresponse：
HTTP/1.1 OK
Date: Wed, Mar :: GMT
Content-Type: text/plain; charset=utf-
Server: Kestrel
Transfer-Encoding: chunkedcontent: contentFromBody: test
可以看到contentFromBody中我们得到了request body的内容。 注意参数没有[FromBody]这个属性 如果加了这个属性，那么如果request body内容匹配request的media type那么Request.body的position会被置于结尾的位置。 举个例子
public string GetJsonString2([FromBody]string content)
{ var reader = new StreamReader(Request.Body);
var contentFromBody = reader.ReadToEnd(); Request.Body.Position = ; var reader2 = new StreamReader(Request.Body);
var contentFromBody2 = reader2.ReadToEnd(); return "content: " + content
+ " contentFromBody: " + contentFromBody
+ " contentFromBody2: " + contentFromBody2;
}
测试结果
request:
POST http://localhost:5000/api/values/GetJsonString2 HTTP/1.1
Accept-Encoding: gzip,deflate
Content-Type: application/json
Content-Length:
Host: localhost:
Connection: Keep-Alive
User-Agent: Apache-HttpClient/4.1. (java 1.5)
testresponse:
HTTP/1.1 OK
Date: Wed, Mar :: GMT
Content-Type: text/plain; charset=utf-
Server: Kestrel
Transfer-Encoding: chunkedcontent: contentFromBody: contentFromBody2: test
