Use python to make an image search engine and save it locally

Idea:

1. First send a request  to the target website to obtain the html source code

2. Extract all image links in the source code

3. Send a request to the image link again to obtain the byte data

4. Save the image locally.

     

Import module:

import requests  #请求库  第三方库，需要安装： pip install requests
import re        #筛选库，py自带，无需安装

1. Search interface:

Open F12 to open the developer tools, click Network, Fetch/XHR, Load, and click in order. You can see that there are two query parameters, which are: word: landscape image queryWord: landscape image

We can use these two query parameters to customize the image content

 

2. Determine the interface we want to crawl

 

3. Customize url query parameters:

You can use format to format parameters. We use the input function to accept parameters input by the user.

word = input('请输入要搜索的图片：')
url = 'https://image.baidu.com/search/acjson?tn=resultjson_com&logid=5853806806594529489&ipn=rj&ct=201326592&is=&fp=result&fr=ala&word={}&queryWord={}&cl=2&lm=-1&ie=utf-8&oe=utf-8&adpicid=&st=&z=&ic=&hd=&latest=&copyright=&s=&se=&tab=&width=&height=&face=&istype=&qc=&nc=&expermode=&nojc=&isAsync=&pn=30&rn=30&gsm=1e&1658411978178='.format(word, word)
print(url) 打开网址就生成我们需要的网址

4. Add request headers for disguise to prevent the server from identifying it as a crawler program

headers = {"User-Agent": 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36 Edg/99.0.1150.39'}

5. Create a folder to determine whether the folder exists. If it exists, create it. If it does not exist, it will overwrite it.

Then send a request and print the source code

if not os.path.exists(files): #假如没有文件执行以下代码：
    os.makedirs(files) #有文件夹则覆盖，没有则创建

#发送请求 获取响应的htm源码
response_html=requests.get(url=url,headers=headers)
print(response_html.text)  #输出源码

6. Extract the image link in the response html source code

result='"thumbURL":"(.*?)"' #正则式
img_list=re.findall(result,response_html)   #调用findall函数进行匹配

7. Traverse the image l link address extracted by the regular expression and then send the request

file_name=1 #使用数字命名图片

for img_url in img_list: #遍历刷选后的网址      
    
    print(img_url) #打印地址

    #发送请求 获取字节数据
    response=requests.get(url=img_url,headers=headers)

8. Set the image save type and save location

 #定义文件名和类型 创建的文件夹路径+文件名+类型
    file=files+word+str(file_name)+'张.jpg' 

    #创建图片文件  写入二进制
    with open(file,mode='wb') as f:

        #写入字节数据
        f.write(response.content)

        #提示
        print(word+str(file_name)+'张.jpg''保存成功') 

        #文件名+1 防止重复
        file_name+=1

 

9. The complete source code can be copied and used. The prerequisite is to install the requests library. 

import re   #筛选url
import requests  #请求
import os  #创建文件夹

word = input('请输入要搜索的图片：')

url = 'https://image.baidu.com/search/acjson?tn=resultjson_com&logid=5853806806594529489&ipn=rj&ct=201326592&is=&fp=result&fr=ala&word={}&queryWord={}&cl=2&lm=-1&ie=utf-8&oe=utf-8&adpicid=&st=&z=&ic=&hd=&latest=&copyright=&s=&se=&tab=&width=&height=&face=&istype=&qc=&nc=&expermode=&nojc=&isAsync=&pn=30&rn=30&gsm=1e&1658411978178='.format(word, word)

#伪装浏览器
headers = {
    "User-Agent": 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.36 Edg/99.0.1150.39'
    }


files='D:/{}/'.format(word) #创建文件夹路径
if not os.path.exists(files): #假如没有文件执行以下代码：
    os.makedirs(files) #有文件夹则覆盖，没有则创建

#获取html源码
response_html=requests.get(url=url,headers=headers)

#正则提取图片
result='"thumbURL":"(.*?)"' #正则式
img_list=re.findall(result,response_html.text)  #筛选

file_name=1 #使用数字命名

for img_url in img_list: #遍历刷选后的网址        get_image(a,i) #将遍历后的url地址传到get-image这个函数
    
    print(img_url) #打印地址

    #发送请求 获取字节数据
    response=requests.get(url=img_url,headers=headers)

    #定义文件名和类型 创建的文件夹路径+文件名+类型
    file=files+word+str(file_name)+'张.jpg' 

    #创建图片文件  写入二进制
    with open(file,mode='wb') as f:

        #写入字节数据
        f.write(response.content)

        #提示
        print(word+str(file_name)+'张.jpg''保存成功') 

        #文件名+1 防止重复
        file_name+=1

Let's take a look at the running results:

 You can see that I am searching for Shiba Inu, and send and save each image link in the source code.

 

So is the saved picture a Shiba Inu? Let’s take a look:

You can see that what is saved is the Shiba Inu picture and a folder named Shiba Inu is created!