使用ASP.netPython的请求发送www.example.com POST

ijnw1ujt 于 2023-03-31 发布在 .NET

关注(0)|答案(2)|浏览(138)

我正在ASP.net使用Python的requests模块抓取一个旧的www.example.com网站。
我花了5个多小时试图找出如何模拟这个POST请求，但没有用。
任何帮助都将不胜感激-这是请求和我的代码，出于简洁和/或隐私的考虑，一些事情被修改：

我自己的代码：

import requests

# Scraping the item number from the website, I have confirmed this is working.

#Then use the newly acquired item number to request the data.
item_url = http://www.example.com/EN/items/Pages/yourrates.aspx?vr= + item_number[0]
viewstate = r'/wEPD...' # Truncated for brevity.

# Create the appropriate request and payload.
payload = {"vr": int(item_number[0])}

item_request_body = {
        "__SPSCEditMenu": "true",
        "MSOWebPartPage_PostbackSource": "",
        "MSOTlPn_SelectedWpId": "",
        "MSOTlPn_View": 0,
        "MSOTlPn_ShowSettings": "False",
        "MSOGallery_SelectedLibrary": "",
        "MSOGallery_FilterString": "",
        "MSOTlPn_Button": "none",
        "__EVENTTARGET": "",
        "__EVENTARGUMENT": "",
        "MSOAuthoringConsole_FormContext": "",
        "MSOAC_EditDuringWorkflow": "",
        "MSOSPWebPartManager_DisplayModeName": "Browse",
        "MSOWebPartPage_Shared": "",
        "MSOLayout_LayoutChanges": "",
        "MSOLayout_InDesignMode": "",
        "MSOSPWebPartManager_OldDisplayModeName": "Browse",
        "MSOSPWebPartManager_StartWebPartEditingName": "false",
        "__VIEWSTATE": viewstate,
        "keywords": "Search our site",
        "__CALLBACKID": "ctl00$SPWebPartManager1$g_dbb9e9c7_fe1d_46df_8789_99a6c9db4b22",
        "__CALLBACKPARAM": "startvr"
    }

# Write the appropriate headers for the property information.
item_request_headers = {
    "Host": home_site,
    "Connection": "keep-alive",
    "Content-Length": len(encoded_valuation_request),
    "Cache-Control": "max-age=0",
    "Origin": home_site,
    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36",
    "Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
    "Cookie": "__utma=48409910.1174413745.1405662151.1406402487.1406407024.17; __utmb=48409910.7.10.1406407024; __utmc=48409910; __utmz=48409910.1406178827.13.3.utmcsr=ratesandvallandingpage|utmccn=landingpages|utmcmd=button",
    "Accept": "*/*",
    "Referer": valuation_url,
    "Accept-Encoding": "gzip,deflate,sdch",
    "Accept-Language": "en-US,en;q=0.8"
}

    response = requests.post(url=item_url, params=payload, data=item_request_body, headers=item_request_headers)
    print response.text

Chrome告诉我请求的样子：

Remote Address:202.55.96.131:80
Request URL:http://www.example.com/EN/items/Pages/yourrates.aspx?vr=123456789
Request Method:POST
Status Code:200 OK

Request Headers
Accept:*/*
Accept-Encoding:gzip,deflate,sdch
Accept-Language:en-US,en;q=0.8
Cache-Control:max-age=0
Connection:keep-alive
Content-Length:21501
Content-Type:application/x-www-form-urlencoded; charset=UTF-8
Cookie:__utma=48409910.1174413745.1405662151.1406402487.1406407024.17; __utmb=48409910.7.10.1406407024; __utmc=48409910; __utmz=48409910.1406178827.13.3.utmcsr=ratesandvallandingpage|utmccn=landingpages|utmcmd=button
Host:www.site.com
Origin:www.site.com
Referer:http://www.example.com/EN/items/Pages/yourrates.aspx?vr=123456789
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36

Query String Parameters
vr:123456789

Form Data
__SPSCEditMenu:true
MSOWebPartPage_PostbackSource:
MSOTlPn_SelectedWpId:
MSOTlPn_View:0
MSOTlPn_ShowSettings:False
MSOGallery_SelectedLibrary:
MSOGallery_FilterString:
MSOTlPn_Button:none
__EVENTTARGET:
__EVENTARGUMENT:
MSOAuthoringConsole_FormContext:
MSOAC_EditDuringWorkflow:
MSOSPWebPartManager_DisplayModeName:Browse
MSOWebPartPage_Shared:
MSOLayout_LayoutChanges:
MSOLayout_InDesignMode:
MSOSPWebPartManager_OldDisplayModeName:Browse
MSOSPWebPartManager_StartWebPartEditingName:false
__VIEWSTATE:/wEPD...(Omitted for length)
keywords:Search our site
__CALLBACKID:ctl00$SPWebPartManager1$g_dbb9e9c7_fe1d_46df_8789_99a6c9db4b22
__CALLBACKPARAM:startvr

asp.net

来源：https://stackoverflow.com/questions/24975955/sending-an-asp-net-post-with-pythons-requests

2条答案

按热度按时间

des4xlb01#

请求参数太多，不应该设置content-type、content-length、host、origin、connection header;* 把这些留给requests来设置 *。
你也在加倍URL参数;要么手动将vr参数添加到URL *，要么 * 使用params，不要两者都做。
POST主体中的一些参数很可能是由绑定到会话的ASP应用程序生成的。我使用带有Session对象valuation_url的GET请求，解析该页面中的表单以提取__CALLBACKID参数。然后请求Session将存储服务器设置的任何cookie并重用它们：

item_request_headers = {
    "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36",
    "Accept": "*/*",
    "Accept-Encoding": "gzip,deflate,sdch",
    "Accept-Language": "en-US,en;q=0.8"
}
payload = {"vr": int(item_number[0])}

session = requests.Session(headers=item_request_headers)

# Get form page
form_response = session.get(validation_url, params=payload) 

# parse form page; BeautifulSoup could do this for example
soup = BeautifulSoup(form_response.content)
callbackid = soup.select('input[name=__CALLBACKID]')[0]['value']

item_request_body = {
    "__SPSCEditMenu": "true",
    "MSOWebPartPage_PostbackSource": "",
    "MSOTlPn_SelectedWpId": "",
    "MSOTlPn_View": 0,
    "MSOTlPn_ShowSettings": "False",
    "MSOGallery_SelectedLibrary": "",
    "MSOGallery_FilterString": "",
    "MSOTlPn_Button": "none",
    "__EVENTTARGET": "",
    "__EVENTARGUMENT": "",
    "MSOAuthoringConsole_FormContext": "",
    "MSOAC_EditDuringWorkflow": "",
    "MSOSPWebPartManager_DisplayModeName": "Browse",
    "MSOWebPartPage_Shared": "",
    "MSOLayout_LayoutChanges": "",
    "MSOLayout_InDesignMode": "",
    "MSOSPWebPartManager_OldDisplayModeName": "Browse",
    "MSOSPWebPartManager_StartWebPartEditingName": "false",
    "__VIEWSTATE": viewstate,
    "keywords": "Search our site",
    "__CALLBACKID": callbackid,
    "__CALLBACKPARAM": "startvr"
}

item_url = 'http://www.example.com/EN/items/Pages/yourrates.aspx'

response = session.post(url=item_url, params=payload, data=item_request_body,
                        headers={'Referer': form_response.url})

会话处理头（设置用户代理和接受参数），只有在会话的POST上，我们才添加引用头。

赞(0）回复(0）举报 2023-03-31

pcww981p2#

与问题标题相关，但不完全是发帖者的情况--我想在Martijn的回答中添加一个有用的技巧，包括一些关于POST请求的一般 * 请求 * 库建议。
在浏览器上检查请求有效负载（例如，开发人员工具中的Chrome的网络选项卡）可能会显示有效负载中有多个特定键/字段。

Chrome请求负载示例：

...
"ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": "AcceptedModified",
"ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": "InvoiceFullyDisputed",
"ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": "DisputedItemsClosed",
...

复制浏览器的请求来匹配你的 requests 的payload/data参数是不起作用的（或者至少不会得到你期望的结果......你仍然可能得到一个200的状态码响应）-它只会发送最后一次出现的键/字段的值。

*请求 * 无法工作的数据/有效负载（或至少无法获得预期的结果）：

payload = {
   ...
   "ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": "AcceptedModified",
   "ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": "InvoiceFullyDisputed",
   "ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": "DisputedItemsClosed",
   ...
}
r = session.post(url, headers=headers, data=payload)

相反，您必须将这些多个键/字段的值放入列表中：

*请求 * 将工作的数据/有效负载（或获得预期结果）：

payload = {
   ...
   "ctl00$cphMain$ctlInvoiceStatuses$lbInvoiceStatus": ["AcceptedModified", "InvoiceFullyDisputed", "DisputedItemsClosed"],
   ...
}
r = session.post(url, headers=headers, data=payload)

...我花了几个小时才意识到这一点，深入研究ASP.NET网站机制，认为有我需要保存的地方。
感谢this Stack Overflow question帮助我实现了这一点。
注意：你可以在请求后查看响应对象上的r.request.body（本例中为r）来检查你发送的有效负载的具体情况。这就是我意识到我的请求缺少一些信息（即多个字段/键）的原因。

赞(0）回复(0）举报 2023-03-31

我来回答

使用ASP.netPython的请求发送www.example.com POST

2条答案

相关问题

热门标签

最新问答