使用python-requests发布下载文件的请求

Question

我试图用python请求创建multipart / form-data。 解决方案应该返回大的csv文件。

但我发布此类请求时遇到问题（原始来自Fiddler）：

POST http://fix-cloud.sbis.ru/view_log/service/sbis-rpc-service300.dll?raw_file_result HTTP/1.1
Host: fix-cloud.sbis.ru
Connection: keep-alive
Content-Length: 579
Cache-Control: max-age=0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Origin: http://fix-cloud.sbis.ru
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary0FyoqFD3QVSl0bly
Referer: http://fix-cloud.sbis.ru/cloud.html
Accept-Encoding: gzip, deflate
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4
Cookie: _ym_uid=1455544058672406990; __utma=60092399.1077522409.1455548286.1455548286.1455548286.1; __utmz=60092399.1455548286.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); timeToCheck=Wed%2C%2024%20Feb%202016%2016%3A18%3A51%20GMT; param=viewer; did=fb1a4666-e652-4f87-abb4-8fbc445bc20d; rightshash=c7b7b64c088c681b0ff84407076cad18; CpsUserId=; tz=-180; RT=; su=00000001-00056a83; sid=00000001-00056a83-00ba-6847661894264e9c

------WebKitFormBoundary0FyoqFD3QVSl0bly
Content-Disposition: form-data; name="Запрос"

{"jsonrpc":"2.0","protocol":4,"method":"ЖурналСообщений.Выгрузить","params":{"Параметры":{"s":[{"t":"Строка","n":"ВремяОт"},{"t":"Строка","n":"ВремяДо"},{"t":"Строка","n":"Группа"}],"d":["2016-02-24 19:18:03.500+03","2016-02-24 19:19:03.500+03","Основной сервис inside"],"_type":"record"},"fileDownloadToken":7140344178769737},"id":"4117712937295437"}
------WebKitFormBoundary0FyoqFD3QVSl0bly--

这不正确。当我试图获取非常大的文件时，服务器返回答案504。

r = s.post(csv_url, headers = post_headers, data = json.dumps(data))

该解决方案无论如何都无法奏效。它回答为500

r = s.post(csv_url, headers = post_headers, files = {'Запрос':(None, json.dumps(data), None)})

卷曲命令

curl 'http://fix-cloud.sbis.ru/view_log/service/sbis-rpc-service300.dll?raw_file_result' -H 'Host: fix-cloud.sbis.ru' -H 'User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0' -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' -H 'Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3' -H 'Accept-Encoding: gzip, deflate' -H 'Referer: http://fix-cloud.sbis.ru/cloud.html' -H 'Cookie: param=viewer; CpsUserId=; did=238ebefa-ec52-4c41-a1d7-8a14fcfdeae4; timeToCheck=Thu%2C%2025%20Feb%202016%2010%3A48%3A55%20GMT; rightshash=c7b7b64c088c681b0ff84407076cad18; tz=-180; RT=; sid=00000001-00056a83-00ba-ffbbb027145646c3; su=00000001-00056a83' -H 'Connection: keep-alive' -H 'Content-Type: multipart/form-data; boundary=---------------------------12195194351941' --data-binary $'-----------------------------12195194351941\r\nContent-Disposition: form-data; name="\u0417\u0430\u043f\u0440\u043e\u0441"\r\n\r\n{"jsonrpc":"2.0","protocol":4,"method":"\u0416\u0443\u0440\u043d\u0430\u043b\u0421\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439.\u0412\u044b\u0433\u0440\u0443\u0437\u0438\u0442\u044c","params":{"\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b":{"s":[{"t":"\u0421\u0442\u0440\u043e\u043a\u0430","n":"\u0412\u0440\u0435\u043c\u044f\u041e\u0442"},{"t":"\u0421\u0442\u0440\u043e\u043a\u0430","n":"\u0412\u0440\u0435\u043c\u044f\u0414\u043e"},{"t":"\u0421\u0442\u0440\u043e\u043a\u0430","n":"\u0413\u0440\u0443\u043f\u043f\u0430"}],"d":["2016-02-25 14:40:02.900+03","2016-02-25 14:40:02.900+03","\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0435\u0440\u0432\u0438\u0441 inside"],"_type":"record"},"fileDownloadToken":36597679759578120},"id":"9150478717440579"}\r\n-----------------------------12195194351941--\r\n'

Answer 1

有关文档，请参阅。

文件元组中的第二个条目应该是一个打开的文件句柄。而是发送字符串json.dumps(data)。将字符串写入文件（或请求可以读取的文件缓冲区），然后发送它。

Answer 2

问题有另一面：ForeFront在我尝试发送更多请求2分钟的任何时候都会阻止我。有了python请求，我无法解决它。

这就是为什么最简单的解决方案是发送多个帖子请求并获取许多小文件。