Question

我一直在尝试在Python 3.6中创建一个基本的多部分表单。 do_GET方法运行正常，但do_POST方法仍然失败。

当我在Chrome中提交表单时，它说 localhost没有发送任何数据。 ERR_EMPTY_RESPONSE ，但是当我检查开发者控制台中的“网络”选项卡时，我可以看到表单值。

代码似乎与Python 2.7完美配合。我不确定代码中出错的地方。

这是我写的代码：

from http.server import BaseHTTPRequestHandler, HTTPServer
import cgi


class WebServerHandle(BaseHTTPRequestHandler):
    def do_GET(self):
        try:
            if self.path.endswith("/new"):
                self.send_response(200)
                self.send_header('Content-type', 'text/html')
                self.end_headers()
                output = ""
                output += "<html><head><style>body {font-family: Helvetica, Arial; color: #333}</style></head>"
                output += "<body><h2>Add new Restaurant</h2>"
                output += "<form method='POST' enctype='multipart/form-data' action='/new'>"
                output += "<input name='newRestaurantName' type='text' placeholder='New Restaurant Name'> "
                output += "<input type='submit' value='Add Restaurant'>"
                output += "</form></html></body>"
                self.wfile.write(bytes(output, "utf-8"))
                return
            if self.path.endswith("/restaurant"):
                self.send_response(200)
                self.send_header('Content-type', 'text/html')
                self.end_headers()
                output = ""
                output += "<html><head><style>body {font-family: Helvetica, Arial; color: #333}</style></head>"
                output += "<body><h3>Restaurant name added successfully!</h3>"
                output += "</html></body>"
                self.wfile.write(bytes(output, "utf-8"))
                return
        except IOError:
            self.send_error(404, 'File Not Found: %s' % self.path)

    def do_POST(self):
        try:
            if self.path.endswith("/new"):
                ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
                if ctype == 'multipart/form-data':
                    fields = cgi.parse_multipart(self.rfile, pdict)
                    restaurant_name = fields.get('newRestaurantName')
                    print("Restaurant name is ", restaurant_name)
                    self.send_response(301)
                    self.send_header('Content-type', 'text/html')
                    self.send_header('Location', '/restaurant')
                    self.end_headers()
        except:
            print("Something went wrong, inside exception..")


def main():
    try:
        server = HTTPServer(('', 8080), WebServerHandle)
        print("Starting web server on the port 8080..")
        server.serve_forever()
    except KeyboardInterrupt:
        print('^C entered. Shutting down the server..')
        server.socket.close()

if __name__ == '__main__':
    main()

Answer 1

进行了更改以解码表单中的字段值。

将self.headers.getheader('content-type')方法更改为

self.headers.('content-type')。

然后在此之后添加以下行，以解码pdict值：

pdict['boundary'] = bytes(pdict['boundary'], "utf-8")，

然后通过从字节转换为字符串来打印字段值，我将print行更改为

print("Restaurant name is ", restaurant_name[0].decode("utf-8"))。

所以最终的代码如下：

    def do_POST(self):
        try:
            if self.path.endswith("/new"):
                ctype, pdict = cgi.parse_header(self.headers['content-type'])
                pdict['boundary'] = bytes(pdict['boundary'], "utf-8")
                if ctype == 'multipart/form-data':
                    fields = cgi.parse_multipart(self.rfile, pdict)
                    print("Fields value is", fields)
                    restaurant_name = fields.get('newRestaurantName')
                    print("Restaurant name is ", restaurant_name[0].decode("utf-8"))
                    self.send_response(301)
                    self.send_header('Content-type', 'text/html')
                    self.send_header('Location', '/restaurant')
                    self.end_headers()
        except:
            print("Inside the exception block")

Answer 2

Python 3.8

def do_POST(self):
        try:
            if self.path.endswith("/new"):
                ctype, pdict = cgi.parse_header(self.headers['content-type'])
                pdict['boundary'] = bytes(pdict['boundary'], "utf-8")
                pdict['CONTENT-LENGTH'] = int(self.headers['Content-Length'])
                if ctype == 'multipart/form-data':
                    fields = cgi.parse_multipart(self.rfile, pdict)
                    print("Fields value is", fields)
                    restaurant_name = fields.get('newRestaurantName')
                    print("Restaurant name is ", restaurant_name[0].decode("utf-8"))
                    self.send_response(301)
                    self.send_header('Content-type', 'text/html')
                    self.send_header('Location', '/restaurant')
                    self.end_headers()
        except:
            print("Inside the exception block")

do_POST方法在Python 3.6中失败

2 个答案: