Image Grabber: Image Batch Download Tool

First, why the image capture always fails? You may be planted in these pits

Those of you who engage in batch downloading of images must have encountered this situation: at the beginning of the grabbing well, and then suddenly the403 Denial of Access, or the download speed becomes slower than a snail's pace. This is most likely the target site to your IP blocked! Many websites have installed "watchdogs" and found that the same IP frequently visits, directly pull the blacklist.

For example, I was helping an e-commerce company to capture product images last week, and I was blocked in half an hour on my own network. Then I used ipipgo's proxy IP pool to spread the requests to different IPs, and I was fine for 8 hours. That's the beauty of proxy IPs -Make the site think it's being accessed by different usersThe

Second, hand teach you to configure the proxy IP

Here's an example of Python's requests library that teaches you to access proxies in three steps:

import requests

 Proxy information from ipipgo (remember to replace it with your own account)
proxy = {
    'http': 'http://用户名:密码@gateway.ipipgo.com:9020',
    'https': 'https://用户名:密码@gateway.ipipgo.com:9020'
}

 Example of a request with a proxy
response = requests.get('image address', proxies=proxy, timeout=10)
with open('image.jpg', 'wb') as f.
    f.write(response.content)

Watch out for potholes:Many newbies will forget to set the timeout parameter, resulting in the program getting stuck. It is recommended to set the timeout at about 10 seconds and switch automatically if the proxy IP fails.

Third, e-commerce picture capture practical skills

Recently, I summarized this process when I helped a client to grab the product detail image of a platform:

Here's a tawdry operation: change the image size parameter to1080×720This HD format, many sites will store different sizes of images, directly under the original image to save time.

Fourth, the proxy IP selection to avoid the pit guide

There are a variety of agency services on the market and it is advisable to focus on these three indicators:

1. Success rate: ipipgo's API interface can reach 99%
2. response speed: within 200ms on average
3. Concurrency support: it is recommended to choose the package that supports more than 50 threads

Never use free proxies on the cheap! The last time I tested a certain free proxy pool.80%'s IPs are all disabledI'm not sure how much I'm going to be able to get out of this, but I'm sure I'll be able to get out of this, and I'm sure I'll be able to get out of this.

V. Frequently Asked Questions QA

Q: What should I do if my proxy IP suddenly fails?
A: Immediately switch IP and check the account status, ipipgo background has real-time availability monitoring, it is recommended to set up automatic switching mechanism.

Q：How can I solve the problem of incomplete downloaded pictures?
A: Check whether the request header carries the Range parameter, some websites need to set it:
headers = {'Range': 'bytes=0-'}

Q: How can I increase my download speed?
A: three tricks: ① use multi-threaded download ② choose the IP node close to the target server ③ compress the image transfer, you can add this parameter:
params = {'quality': '75'}

Sixth, these red lines should never be touched!

A final reminder:
1. Don't touch images that require a login to access
2. Pay attention to the robots.txt protocol of the website
3. Attention to copyright issues in commercial photographs
4. control the frequency of downloads do not make other people's servers hanging

Using a proxy IP is like driving a car with traffic regulations, and ipipgo's customer service team reminds users to be compliant. In case of uncertainty, it is best to consult their technical advisors first.