urllib3

python urllib3 login + search

天涯浪子 提交于 2020-04-19 03:03:15
问题 import urllib3 import io from bs4 import BeautifulSoup import re import cookielib http = urllib3.PoolManager() url = 'http://www.example.com' headers = urllib3.util.make_headers(keep_alive=True,user_agent='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6') r = http.urlopen('GET', url, preload_content=False) # Params die dann am Post request übergeben werden params = { 'login': '/shop//index.php', 'user': 'username', 'pw': 'password' } suche = { 'id' :

python urllib3 login + search

僤鯓⒐⒋嵵緔 提交于 2020-04-19 03:01:26
问题 import urllib3 import io from bs4 import BeautifulSoup import re import cookielib http = urllib3.PoolManager() url = 'http://www.example.com' headers = urllib3.util.make_headers(keep_alive=True,user_agent='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6') r = http.urlopen('GET', url, preload_content=False) # Params die dann am Post request übergeben werden params = { 'login': '/shop//index.php', 'user': 'username', 'pw': 'password' } suche = { 'id' :

scrapy爬虫时HTTPConnectionPool(host:XX)Max retries exceeded with url 解决方法

爱⌒轻易说出口 提交于 2020-04-17 03:01:45
【推荐阅读】微服务还能火多久?>>> 问题1: 爬虫多次访问同一个网站一段时间后会出现错误 HTTPConnectionPool(host:XX)Max retries exceeded with url '<requests.packages.urllib3.connection.HTTPConnection object at XXXX>: Failed to establish a new connection: [Errno 99] Cannot assign requested address' 原因: 是因为在每次数据传输前客户端要和服务器建立TCP连接,为节省传输消耗,默认为keep-alive,即连接一次,传输多次,然而在多次访问后不能结束并回到连接池中,导致不能产生新的连接 解决: headers中的Connection默认为keep-alive,将header中的Connection一项置为close headers = { 'Connection': 'close', } r = requests.get(url, data=formdata, headers=headers) 参考: https://blog.csdn.net/ZTCooper/article/details/80220063 问题2: 爬虫多次访问同一个网站一段时间后会出现错误

快速上手百度大脑EasyDL专业版·物体检测模型(附代码)

谁说胖子不能爱 提交于 2020-03-23 19:31:52
3 月,跳不动了?>>> 作者:才能我浪费99 1. 简介: 1.1. 什么是EasyDL专业版 EasyDL专业版是EasyDL在2019年10月下旬全新推出的针对AI初学者或者AI专业工程师的企业用户及开发者推出的AI模型训练与服务平台,目前支持视觉及自然语言处理两大技术方向,内置百度海量数据训练的预训练模型,可灵活脚本调参,只需少量数据可达到优模型效果。 适用人群: 专业AI工程师且追求灵活、深度调参的企业或个人开发者 支持定制模型类型。 1.2. 支持视觉及自然语言处理两大技术方向: 视觉:支持图像分类及物体检测两类模型训练。 任务类型: 预置算法 图像分类: Resnet(50,101)、Se_Resnext(50,101)、Mobilenet Nasnet 物体检测: FasterRCNN、YoloV3、mobilenetSSD 自然语言处理:支持文本分类及短文本匹配两类模型训练,内置百度百亿级数据所训练出的预训练模型ENNIE. ERNIE(艾尼)是百度自研持续学习语义理解框架,该框架可持续学习海量数据中的知识。基于该框架的ERNIE2.0预训练模型,已累计学习10亿多知识,中英文效果全面领先,适用于各类NLP应用场景。 任务类型 :预置网络 文本分类: BOW、CNN、GRU、TextCNN、LSTM、BiLSTM 短文本匹配:SimNet(BOW、CNN、GRU

Python2/3 解决访问Https时不受信任SSL证书问题

耗尽温柔 提交于 2020-03-12 11:31:42
问题: 在浏览器中访问该网站时会弹出证书不受信任,但是忽略仍可继续访问 但当使用Python登录时就会抛出_ssl.c:645错误,不能读取页面。 之前在做Android开发用Jsoup访问该站时也会有问题,当时的解决办法是写一个方法直接信任所有Https的安全证书,就在想python是不是也是可以这样做。 1、修改_create_default_https_context变量 import ssl ssl._create_default_https_context = ssl._create_unverified_context 这样就可以解决了! 2、 使用requests库发送请求的时候直接设置verify=False取消验证即可,会有下面问题 问题到此为止还没结束,取消SSL验证又带来一个新问题。出现了警告信息,这个锅是urllib3的。 InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. 虽然不是错误,但是在捕捉异常时,默认会出问题,为了不影响原有流程,应该去掉这些警告信息。 或者直接取消所有urllib3的警告 requests.packages.urllib3.disable

AttributeError: module 'urllib3' has no attribute 'urlopen' in python

心已入冬 提交于 2020-03-03 13:57:48
问题 I am trying to send temperature data over onto one of my website currently online. This code consists of measuring the temperature through a sensor(ds18b20), sending that data onto a mysql databse entitled temp_pi and specifically onto a table intitled TAB_CLASSROOM and lastly sending that data onto a webpage of mine. Everything in this code runs except for the sendDataToServer() part. I specify the error right before this particular line. I have the PHP set up on my website for this to work.

How to handle proxies in urllib3

纵然是瞬间 提交于 2020-02-14 05:45:34
问题 I am having trouble finding solid examples of how to build a simple script in urllib3 which opens a url (via a proxy), then reads it and finally prints it. The proxy requires a user/pass to authenticate however it's not clear to me how you do this? Any help would be appreciated. 回答1: urllib3 has a ProxyManager component which you can use. You'll need to build headers for the Basic Auth component, you can either do that manually or use the make_headers helper in urllib3. All together, it would

How to perform time limited response download with python requests?

早过忘川 提交于 2020-01-20 19:02:59
问题 When downloading a large file with python, I want to put a time limit not only for the connection process, but also for the download. I am trying with the following python code: import requests r = requests.get('http://ipv4.download.thinkbroadband.com/1GB.zip', timeout = 0.5, prefetch = False) print r.headers['content-length'] print len(r.raw.read()) This does not work (the download is not time limited), as correctly noted in the docs: https://requests.readthedocs.org/en/latest/user

How to perform time limited response download with python requests?

流过昼夜 提交于 2020-01-20 19:01:17
问题 When downloading a large file with python, I want to put a time limit not only for the connection process, but also for the download. I am trying with the following python code: import requests r = requests.get('http://ipv4.download.thinkbroadband.com/1GB.zip', timeout = 0.5, prefetch = False) print r.headers['content-length'] print len(r.raw.read()) This does not work (the download is not time limited), as correctly noted in the docs: https://requests.readthedocs.org/en/latest/user

How to perform time limited response download with python requests?

ぃ、小莉子 提交于 2020-01-20 19:01:04
问题 When downloading a large file with python, I want to put a time limit not only for the connection process, but also for the download. I am trying with the following python code: import requests r = requests.get('http://ipv4.download.thinkbroadband.com/1GB.zip', timeout = 0.5, prefetch = False) print r.headers['content-length'] print len(r.raw.read()) This does not work (the download is not time limited), as correctly noted in the docs: https://requests.readthedocs.org/en/latest/user