这篇文章将为大家详细讲解有关如何解决Python爬取网页时请求中收到响应400的问题，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。
一般情况下抓取网页时找到url中可以从 post 请求中获取数据，但得到的响应是400而不是 200时，可以尝试从服务器获得正确的响应，使用json=参数requests进行尝试可以解决。
问题案例：
import requests
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:90.0) Gecko/20100101 Firefox/90.0', 'Accept': 'application/json', 'Accept-Language': 'en-US,en;q=0.5', 'Content-Type': 'application/x-www-form-urlencoded', 'Origin': 'https://www.ketto.org', 'Sec-Fetch-Dest': 'empty', 'Sec-Fetch-Mode': 'cors', 'Sec-Fetch-Site': 'cross-site', 'Referer': 'https://www.ketto.org/', 'Connection': 'keep-alive',
}
params = (
('x-algolia-agent', 'Algolia for JavaScript (3.35.1); Browser (lite); angular (8.2.14); angular-instantsearch (3.0.0-beta.4); instantsearch.js (3.7.0); JS Helper (2.28.1)'),
('x-algolia-application-id', 'NN2UORRIZX'),
('x-algolia-api-key', 'b2caa1b0589e8db9398d5fe2a40bbaed'),
)
data = [
('{requests:[{indexName:fundraiser_prod,params:query', ''),
('hitsPerPage', '9'),
('hitsPerPage', '1'),
('hitsPerPage', '1'),
('hitsPerPage', '1'),
('maxValuesPerFacet', '10'),
('maxValuesPerFacet', '10'),
('maxValuesPerFacet', '10'),
('maxValuesPerFacet', '10'),
('page', '1'),
('page', '0'),
('page', '0'),
('page', '0'),
('highlightPreTag', '__ais-highlight__'),
('highlightPreTag', '__ais-highlight__'),
('highlightPreTag', '__ais-highlight__'),
('highlightPreTag', '__ais-highlight__'),
('highlightPostTag', '__/ais-highlight__'),
('highlightPostTag', '__/ais-highlight__'),
('highlightPostTag', '__/ais-highlight__'),
('highlightPostTag', '__/ais-highlight__'),
('facets', '["cause.label","tags","address"]'),
('facets', '["cause.label"]'),
('facets', '["tags"]'),
('facets', '["address"]'),
('tagFilters', ''),
('tagFilters', ''),
('tagFilters', ''),
('tagFilters', ''),
('facetFilters', '[["cause.label:"],["tags:"],["address:"]]},{indexName:fundraiser_prod,params:query='),
('facetFilters', '[["tags:"],["address:"]]},{indexName:fundraiser_prod,params:query='),
('facetFilters', '[["cause.label:"],["address:"]]},{indexName:fundraiser_prod,params:query='),
('facetFilters', '[["cause.label:"],["tags:"]]}]}'),
('attributesToRetrieve', '[]'),
('attributesToRetrieve', '[]'),
('attributesToRetrieve', '[]'),
('attributesToHighlight', '[]'),
('attributesToHighlight', '[]'),
('attributesToHighlight', '[]'),
('attributesToSnippet', '[]'),
('attributesToSnippet', '[]'),
('attributesToSnippet', '[]'),
('analytics', 'false'),
('analytics', 'false'),
('analytics', 'false'),
('clickAnalytics', 'false'),
('clickAnalytics', 'false'),
('clickAnalytics', 'false'),
]
response = requests.post('https://nn2uorrizx-dsn.algolia.net/1/indexes/*/queries', headers=headers, params=params, data=data)
print(response)代码进行优化处理：
import requestsurl = "https://nn2uorrizx-dsn.algolia.net/1/indexes/*/queries"params = {
"x-algolia-agent": "Algolia for JavaScript (3.35.1); Browser (lite); angular (8.2.14); angular-instantsearch (3.0.0-beta.4); instantsearch.js (3.7.0); JS Helper (2.28.1)", "x-algolia-application-id": "NN2UORRIZX", "x-algolia-api-key": "b2caa1b0589e8db9398d5fe2a40bbaed",}data = {
"requests": [
{
"indexName": "fundraiser_prod", "params": "query=&hitsPerPage=9&maxValuesPerFacet=10&page=0&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&facets=%5B%22cause.label%22%2C%22tags%22%2C%22address%22%5D&tagFilters=&facetFilters=%5B%5B%22cause.label%3A%22%5D%2C%5B%22tags%3A%22%5D%2C%5B%22address%3A%22%5D%5D",
},
{
"indexName": "fundraiser_prod", "params": "query=&hitsPerPage=1&maxValuesPerFacet=10&page=0&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&attributesToRetrieve=%5B%5D&attributesToHighlight=%5B%5D&attributesToSnippet=%5B%5D&tagFilters=&analytics=false&clickAnalytics=false&facets=%5B%22cause.label%22%5D&facetFilters=%5B%5B%22tags%3A%22%5D%2C%5B%22address%3A%22%5D%5D",
},
{
"indexName": "fundraiser_prod", "params": "query=&hitsPerPage=1&maxValuesPerFacet=10&page=0&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&attributesToRetrieve=%5B%5D&attributesToHighlight=%5B%5D&attributesToSnippet=%5B%5D&tagFilters=&analytics=false&clickAnalytics=false&facets=%5B%22tags%22%5D&facetFilters=%5B%5B%22cause.label%3A%22%5D%2C%5B%22address%3A%22%5D%5D",
},
{
"indexName": "fundraiser_prod", "params": "query=&hitsPerPage=1&maxValuesPerFacet=10&page=0&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&attributesToRetrieve=%5B%5D&attributesToHighlight=%5B%5D&attributesToSnippet=%5B%5D&tagFilters=&analytics=false&clickAnalytics=false&facets=%5B%22address%22%5D&facetFilters=%5B%5B%22cause.label%3A%22%5D%2C%5B%22tags%3A%22%5D%5D",
},
]}data = requests.post(url, params=params, json=data).json()print(json.dumps(data, indent=4))打印结果：
{
"results": [
{
"hits": [
{
"id": 180773,
"title": "Feeding From Far-Ration Distribution Amid Lockdown",
"end_date": "2021-09-11 23:59:59",
"amount_requested": 65000000,
"entity_details_id": 1505699,
"creator_entity_details_id": 1463388,
"address_1": "Mumbai",
"creation_date": "2020-04-05 15:10:12",
"parent_cause_id": 48,
"event_entity_details_id": 1399904,
"sucess_story_flag": 0,
"custom_tag": "FeedingFromFarForCorona",
"beneficiary": {
"full_name": "Prayatna "
},
"raised": {
"campaign_id": 180773,
"backers": 10616,
"raised": "45094771.40",
"usdraised": "644211.02",
"currencies": {
"INR": 45094771,
"USD": 644211,
"GBP": 501053,
"EUR": 536843,
"AED": 2254739,
"SGD": 867207,
"SAR": 2254739
}
},
"widget": {
"media_type": "image",
"file_name": "wid60a133a89542c.jpg",
"path": "/media/campaign/180000/180773/image/",
"cdn_path": "https://d1vdjc70h9nzd9.cloudfront.net/media/campaign/180000/180773/image/wid60a133a89542c.jpg"
},
"cause": {
"info_1": "Food & Hunger",
"info_3": "Orange",
"label": "Food & Hunger"
},
"campaigner": {
"id": 1463388,
"fname": "Pooja Reddy",
"lname": null,
"full_name": "Pooja Reddy ",
"disable_foreign_donation": 0,
"no_80g": false,
"user_details_id": 1470493,
"entity_type": "individual",
"tax_benefit": false,
"avtar": {
"entity_type_id": 1463388,
"entity_type": "individual",
"media_type": "image",
"file_name": "60efdb6db4758.jpg",
"path": "/media/individual/1463000/1463388/image/",
"cdn_path": "https://d1vdjc70h9nzd9.cloudfront.net/media/individual/1463000/1463388/image/60efdb6db4758.jpg"
}
},
"taxexempted": {
"id": 1505699,
"no_80g": true,
"entity_type": "ngo",
"tax_benefit": true
},... and so on.}关于“如何解决Python爬取网页时请求中收到响应400的问题”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。