【Python】WSGI简单Web服务器，处理GET和POST请求

本文链接：https://blog.youkuaiyun.com/wzr2016/article/details/128170837

本文介绍了一个基于Python WSGI的简易Web服务器实现，该服务器能够处理GET和POST请求，并根据请求路径提供静态资源或定制化的HTML响应。通过具体代码示例展示了如何使用Python进行Web开发。

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【Python】WSGI简单Web服务器，处理GET和POST请求

- Python服务器代码
- 静态HTML文件代码

Python服务器代码

"""
Small wsgiref based web server. Takes a path to serve from and an
optional port number (defaults to 8000), then tries to serve files.
MIME types are guessed from the file names, 404 errors are raised
if the file is not found.
"""
import mimetypes
import os
import sys
from wsgiref import simple_server, util
from urllib.parse import parse_qs


def app(environ, respond):
    get_query_ =environ['QUERY_STRING']
    post_query_=environ["wsgi.input"].read(int(e)).decode("utf-8", 'ignore') if (e:=environ.get("CONTENT_LENGTH")) else None
    get_query =parse_qs(get_query_)
    post_query=parse_qs(post_query_)

    print("REQUEST_METHOD: "+environ['REQUEST_METHOD'])
    print("GET : ",(get_query))
    print("POST: ",(post_query))

    if(environ["PATH_INFO"].startswith(r"/post")):
        respond("200 OK", [("Content-Type", "text/html; charset=utf-8")])
        message=("Welcome, "+e[0]+" !") if (e:=post_query.get('username')) else "Welcome ! "
        html = '''<!DOCTYPE HTML>
        <html>
            <head>
                <title>Post page</title>  
            </head>
            <body>
                <h1>  %s  </h1>
                Post Data:<br> %s  <br />
                Path:<br> %s  <br />
            </body>
        </html>''' %( message, str(post_query), environ["PATH_INFO"])
        return [html.encode("utf-8")]
    else:
        # Get the file name and MIME type
        fn = os.path.join(path,"res", environ["PATH_INFO"][1:])
        if "." not in fn.split(os.path.sep)[-1]:
            fn = os.path.join(fn, "index.html")
        mime_type = mimetypes.guess_type(fn)[0]


        # Return 200 OK if file exists, otherwise 404 Not Found
        if os.path.exists(fn):
            respond("200 OK", [("Content-Type", mime_type)])
            return util.FileWrapper(open(fn, "rb"))
        else:
            respond("404 Not Found", [("Content-Type", "text/plain")])
            return [b"not found"]


if __name__ == "__main__":
    # Get the path and port from command-line arguments
    path = sys.argv[1] if len(sys.argv) > 1 else os.getcwd()
    port = int(sys.argv[2]) if len(sys.argv) > 2 else 8000

    # Make and start the server until control-c
    httpd = simple_server.make_server("", port, app)
    print(f"Serving {path} on port {port}, control-C to stop")
    try:
        httpd.serve_forever()
    except KeyboardInterrupt:
        print("Shutting down.")
        httpd.server_close()

静态HTML文件代码

<!DOCTYPE HTML>
<html>

<head>
    <meta charset="utf-8">
    <title>⭐⭐⭐⭐⭐</title>
</head>

<body>
    <form action="post_page" method="post">
        username: <input type="text" name="username" /><br />
        password: <input type="password" name="password" /><br />
        文本框: <input type="textarea" name="textarea" /><br />
        <input type="submit" value="POST" />
    </form>
    <a href="logo.gif" download="mylogo.gif">download</a>
</body>

</html>