正文中带有 json 的原始 POST 请求

Question

在使用 modeMCU 的 Lua 程序中，我的 HTTP POST 请求出现问题。

我根据httpbin.org/post 测试我的请求。

我想发送json数据，所以我的要求是：

POST /post HTTP/1.1
Host: httpbin.org
Connection: close
Accept: */*
User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)
Content-Type: application/json

{...some JSON here}

回复是：

HTTP/1.1 200 OK
Server: nginx
Date: Mon, 07 Sep 2015 10:39:12 GMT
Content-Type: application/json
Content-Length: 332
Connection: close
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true

{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {}, 
  "headers": {
    "Accept": "*/*", 
    "Content-Type": "application/json", 
    "Host": "httpbin.org", 
    "User-Agent": "Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)"
  }, 
  "json": null, 
  "origin": "5.51.195.252", 
  "url": "http://httpbin.org/post"
}

我已经为我的身体尝试了另外 2 种语法：

POST /post HTTP/1.1
Host: httpbin.org
Connection: close
Accept: */*
User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)
Content-Type: application/json

json:{...some JSON here}

和

POST /post HTTP/1.1
Host: httpbin.org
Connection: close
Accept: */*
User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)
Content-Type: application/json

"json":"{...some JSON here}"

没有工作...

你有什么想法吗？

注意：当我使用 curl -v -d @somejson.json -H "Content-Type: application/json" -i -v "http://httpbin.org/post" 时，它可以工作，但我无法获得原始请求

Answer 1

答案是：我忘了在我的 POST 标头中提及“Content-Length”！

Lua 代码：

req = "POST /incomingData/addData/"                      
        .." HTTP/1.1\r\n" 
        .."Host: secret-spire-9368.herokuapp.com\r\n" 
        .."Connection: close\r\n"
        .."Accept: */*\r\n" 
        .."User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)\r\n" 
        .."Content-Type: application/json\r\n"
        .."Content-Length: "..string.len(json).."\r\n"
        .."\r\n"
        ..json.."\r\n"

正确的 POST 请求：

POST /post HTTP/1.1
Host: httpbin.org
Connection: close
Accept: */*
User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)
Content-Type: application/json
Content-Length: 278

{...some JSON here}

Answer 2

您好，我认为这段代码可以解决您的问题：

conn = net.createConnection(net.TCP, 0)
json='{"request":"give me some response"}'
req = "POST /post"                      
        .." HTTP/1.1\r\n" 
        .."Host: httpbin.org\r\n" 
        .."Connection: close\r\n"
        .."Accept: */*\r\n" 
        .."User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)\r\n" 
        .."Content-Type: application/json\r\n"
        .."Content-Length: "..string.len(json).."\r\n"
        .."\r\n"
        ..json.."\r\n"
conn:on("receive", function(sck, payload) print(payload) end)
conn:on("connection", function(sck)
  sck:send(req)end)
conn:connect(80, "httpbin.org")
print(req);

生成的请求：

POST /post HTTP/1.1
Host: httpbin.org
Connection: close
Accept: */*
User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)
Content-Type: application/json
Content-Length: 35

{"request":"give me some response"}

收到的回复：

HTTP/1.1 200 OK
Connection: close
Server: gunicorn/19.7.1
Date: Sun, 23 Apr 2017 20:45:58 GMT
Content-Type: application/json
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true
Content-Length: 465
Via: 1.1 vegur

{
  "args": {}, 
  "data": "{\"request\":\"give me some response\"}", 
  "files": {}, 
  "form": {}, 
  "headers": {
    "Accept": "*/*", 
    "Connection": "close", 
    "Content-Length": "35", 
    "Content-Type": "application/json", 
    "Host": "httpbin.org", 
    "User-Agent": "Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)"
  }, 
  "json": {
    "request": "give me some response"
  }, 
  "origin": "47.8.6.52", 
  "url": "http://httpbin.org/post"
}

要记住的事情

将字符串传递给任何函数或变量时包含双引号（即""），必须用单引号括起来''，如'""'）

例如：

这个可以用：

json='{"request":"给我一些回应"}'

这不会：

json="{"request":"给我一些回应"}"

这里..用于连接两个字符串：

“POST /post”..“HTTP/1.1\r\n”

你也可以这样写请求：

但在这里您必须提及正确的 Content-Length 即您发送的长度 os json 数据

 req = "POST /post"                      
            .." HTTP/1.1\r\n" 
            .."Host: httpbin.org\r\n" 
            .."Connection: close\r\n"
            .."Accept: */*\r\n" 
            .."User-Agent: Mozilla/4.0 (compatible; esp8266 Lua; Windows NT 5.1)\r\n" 
            .."Content-Type: application/json\r\n"
            .."Content-Length: 35\r\n"
            .."\r\n"
            ..'{"request":"give me some response"}'.."\r\n"