NC 发送HTTP 报文请求

查找DNS地址

首先查找httpbin.org 的dns 地址

nslookup httpbin.org
Server:         10.255.255.254
Address:        10.255.255.254#53

Non-authoritative answer:
Name:   httpbin.org
Address: 18.213.123.165
Name:   httpbin.org
Address: 34.224.200.202

nc 使用HTTP/1.0 协议与httpbin.org 进行报文通讯

❯ nc -v 18.213.123.165 80

Connection to 18.213.123.165 80 port [tcp/http] succeeded!
GET /get HTTP/1.0 


HTTP/1.1 200 OK
Date: Tue, 03 Dec 2024 02:22:19 GMT
Content-Type: application/json
Content-Length: 317
Connection: close
Server: gunicorn/19.9.0
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true

{
  "args": {}, 
  "headers": {
    "Host": "k8s-pmhttpbi-pmhttpbi-4b5623588d-1738525105.us-east-1.elb.amazonaws.com", 
    "X-Amzn-Trace-Id": "Root=1-674e6b5b-33e7909f46b99703252571c3"
  }, 
  "origin": "128.1.97.123", 
  "url": "http://k8s-pmhttpbi-pmhttpbi-4b5623588d-1738525105.us-east-1.elb.amazonaws.com/get"
}

• -v 参数是打印详细信息
• GET /get HTTP/1.0 是自己手动输入的
• Enter 按两次

使用echo 命令转义字符

echo -e "GET /get HTTP/1.0\r\n" | nc  18.213.123.165 80

nc 使用HTTP/1.1 协议与httpbin.org 进行报文通讯

❯ nc -v 18.213.123.165 80

Connection to 18.213.123.165 80 port [tcp/http] succeeded!
GET /get HTTP/1.1
HOST: httpbin.org

HTTP/1.1 200 OK
Date: Tue, 03 Dec 2024 02:27:10 GMT
Content-Type: application/json
Content-Length: 197
Connection: keep-alive
Server: gunicorn/19.9.0
Access-Control-Allow-Origin: *
Access-Control-Allow-Credentials: true

{
  "args": {}, 
  "headers": {
    "Host": "httpbin.org", 
    "X-Amzn-Trace-Id": "Root=1-674e6c7e-1299f1db390d3827443ff03b"
  }, 
  "origin": "128.1.97.123", 
  "url": "http://httpbin.org/get"
}

echo -e "GET /get HTTP/1.1\r\nHost: httpbin.org\r\n" | nc -v 18.213.123.165 80

使用nc 发送POST 请求

curl -X POST http://httpbin.org/post -d "key=value&key2=value2"

{
  "args": {}, 
  "data": "", 
  "files": {}, 
  "form": {
    "key": "value", 
    "key2": "value2"
  }, 
  "headers": {
    "Accept": "*/*", 
    "Content-Length": "21", 
    "Content-Type": "application/x-www-form-urlencoded", 
    "Host": "httpbin.org", 
    "User-Agent": "curl/7.81.0", 
    "X-Amzn-Trace-Id": "Root=1-674e7914-6f0d751e2b96f59a18092076"
  }, 
  "json": null, 
  "origin": "107.175.218.218", 
  "url": "http://httpbin.org/post"
}

1. 直接使用 get 中的方式

echo -e "POST /post HTTP/1.0\r\n\r\nkey1=value1&key2=value2" | nc -v 18.213.123.165 80

# 响应没有解析出来

2. 直接使用表单格式

   echo -e "POST /post HTTP/1.0\r\nContent-Type: application/x-www-form-urlencoded\r\n\r\nkey1=value1&key2=value2" | nc -v 18.213.123.165 80
   # 没有解析出来

3. 使用 Content-Length + form

echo -e "POST /post HTTP/1.0\r\nContent-Type: application/x-www-form-urlencoded\r\nContent-Length: 23\r\n\r\nkey1=value1&key2=value2" | nc -v 18.213.123.165 80

  #"form": {
  #  "key1": "value1",
  #  "key2": "value2"
  #}

4. 只使用Content-Length

echo -e "POST /post HTTP/1.0\r\nContent-Length: 23\r\n\r\nkey1=value1&key2=value2" | nc -v 18.213.123.165 80

​ 只在data 中有值

"data": "key1=value1&key2=value2"

使用nc 发送HEAD请求

echo "HEAD / HTTP/1.0\r\n" | nc -v 18.213.123.165 80