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【12.5】asyncio模拟http请求

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发布于 2019/08/19 19:39
字数 4794
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 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 # asyncio 没有提供http协议的接口
 4 import asyncio
 5 import time
 6 from urllib.parse import urlparse
 7 
 8 
 9 async def get_url(url):
10     url = urlparse(url)
11     host = url.netloc
12     path = url.path
13     if path == '':
14         path = '/'
15 
16     # 建立连接
17     # asyncio.open_connection是一个协程
18     reader, writer = await asyncio.open_connection(host, 80)
19     writer.write("GET {} HTTP/1.1\r\nHost:{}\r\nConnection:close\r\n\r\n".format(path, host).encode('utf-8'))
20     all_lines = []
21     async for raw_line in reader:
22         line = raw_line.decode('utf-8')
23         all_lines.append(line)
24     html = '\n'.join(all_lines)
25     return html
26 
27 
28 async def main():
29     tasks = []
30     for url in range(1, 21):
31         url = 'http://shop.projectsedu.com/goods/{}/'.format(url)
32         tasks.append(asyncio.ensure_future(get_url(url)))
33     for task in asyncio.as_completed(tasks):
34         # asyncio.as_completed返回的是一个协程
35         result = await task
36         print(result)
37 
38 
39 if __name__ == '__main__':
40     start_time = time.time()
41     loop = asyncio.get_event_loop()
42     loop.run_until_complete(main())
43     print('last time:{}'.format(time.time() - start_time))
HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 1497

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 989

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 968

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 979

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 984

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 1002

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 1674

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 1678

Connection: close

Vary: Accept, Cookie

Allow: GET, HEAD, OPTIONS

X-Frame-Options: SAMEORIGIN



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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:06 GMT

Content-Type: application/json

Content-Length: 1964

Connection: close

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Allow: GET, HEAD, OPTIONS

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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:07 GMT

Content-Type: application/json

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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:07 GMT

Content-Type: application/json

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Connection: close

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Allow: GET, HEAD, OPTIONS

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HTTP/1.1 200 OK

Server: nginx/1.12.2

Date: Mon, 19 Aug 2019 11:38:07 GMT

Content-Type: application/json

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