python解析http响应(字符串)

Question

我正在使用 python 2.7，我想解析我已经从文本文件中提取的字符串 HTTP 响应字段。最简单的方法是什么？我可以使用 BaseHTTPServer 解析请求，但无法找到响应的内容。

我的回复非常标准，格式如下

HTTP/1.1 200 OK
Date: Thu, Jul  3 15:27:54 2014
Content-Type: text/xml; charset="utf-8"
Connection: close
Content-Length: 626

提前致谢

Answer 1

您可能会发现这很有用，请记住 HTTPResponse并非旨在“由用户直接实例化”。

另请注意，响应字符串中的内容长度 header 可能不再有效(这取决于您获取这些响应的方式)这仅意味着对 HTTPResponse.read() 的调用需要具有更大的值比内容更重要。

在python 2中可以这样运行。

from httplib import HTTPResponse
from StringIO import StringIO

http_response_str = """HTTP/1.1 200 OK
Date: Thu, Jul  3 15:27:54 2014
Content-Type: text/xml; charset="utf-8"
Connection: close
Content-Length: 626"""

class FakeSocket():
    def __init__(self, response_str):
        self._file = StringIO(response_str)
    def makefile(self, *args, **kwargs):
        return self._file

source = FakeSocket(http_response_str)
response = HTTPResponse(source)
response.begin()
print "status:", response.status
print "single header:", response.getheader('Content-Type')
print "content:", response.read(len(http_response_str)) # the len here will give a 'big enough' value to read the whole content

在python 3中，HTTPResponse是从http.client导入的，需要解析的response需要进行字节编码。根据从何处获取数据，这可能已经完成或需要显式调用

from http.client import HTTPResponse
from io import BytesIO

http_response_str = """HTTP/1.1 200 OK
Date: Thu, Jul  3 15:27:54 2014
Content-Type: text/xml; charset="utf-8"
Connection: close
Content-Length: 626

teststring"""

http_response_bytes = http_response_str.encode()

class FakeSocket():
    def __init__(self, response_bytes):
        self._file = BytesIO(response_bytes)
    def makefile(self, *args, **kwargs):
        return self._file

source = FakeSocket(http_response_bytes)
response = HTTPResponse(source)
response.begin()
print( "status:", response.status)
# status: 200
print( "single header:", response.getheader('Content-Type'))
# single header: text/xml; charset="utf-8"
print( "content:", response.read(len(http_response_str)))
# content: b'teststring'