[Python] about crawling Baidu translation anderrno: 998 &errno: 997

First of all, I have to say , Baidu's anti climbing is getting more and more strict .

Of course, this is the inevitable trend of development , The law is strong , According to the experimental conjecture , Every time the input is updated , There will be "errno":998&“errno”:997 Error of , The reason lies in Cookie And... In the request body sign, They will follow the input string （ Translation content ） Different , Make changes , So as to judge whether it is a real person operation , That is, reverse climbing . I guess so , Below are some examples .

First, crawl the translated content ：

Simulate the mobile client here

import requests
url = "https://fanyi.baidu.com/basetrans"
data_dict = {

"query": " Life is too short , I use python",
"from": "zh",
"to": "en",
"sign": "289133.35420",
"token": "a6dbbcd713a85388863dacc0cdc3c513"
}
headers_dict = {

"User-Agent": "Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) "
"Version/11.0 Mobile/15A372 Safari/604.1",
"Cookie": "BAIDUID=0A56A2723B57B8F4AEEE056D1D4E3890:FG=1; BIDUPSID=09634B3C85E8CC2A6A6A194E2A79F93A; "
"PSTM=1575051572; BDORZ=FFFB88E999055A3F8A630C64834BD6D0; "
"BDUSS=k5kOWVRRFBmVUh5NU1QZlYxZ1JXQkR4SDV2QjJPbllCczVqeUtmcVZxVHp"
"-QWxlRVFBQUFBJCQAAAAAAAAAAAEAAABqcBczamlhX"
"-ixAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPNv4l3zb-Jdf; "
"H_PS_PSSID=1423_21082_20697; Hm_lvt_64ecd82404c51e03dc91cb9e8c025574=1575127780,1575135783; "
"Hm_lpvt_64ecd82404c51e03dc91cb9e8c025574=1575135802; "
"from_lang_often=%5B%7B%22value%22%3A%22est%22%2C%22text%22%3A%22%u7231%u6C99%u5C3C%u4E9A%u8BED%22%7D%2C"
"%7B%22value%22%3A%22cs%22%2C%22text%22%3A%22%u6377%u514B%u8BED%22%7D%2C%7B%22value%22%3A%22zh%22%2C"
"%22text%22%3A%22%u4E2D%u6587%22%7D%5D; "
"to_lang_often=%5B%7B%22value%22%3A%22en%22%2C%22text%22%3A%22%u82F1%u8BED%22%7D%2C%7B%22value%22%3A"
"%22zh%22%2C%22text%22%3A%22%u4E2D%u6587%22%7D%5D; REALTIME_TRANS_SWITCH=1; FANYI_WORD_SWITCH=1; "
"HISTORY_SWITCH=1; SOUND_SPD_SWITCH=1; SOUND_PREFER_SWITCH=1; "
"yjs_js_security_passport=92fcd939ce7b8845e696d1832c93d907288129ac_1575135808_js; "
"BDSFRCVID=3q-sJeCCxG3jlXJwI7hzbnFY0dQ_1_WOoxuo3J; "
"H_BDCLCKID_SF=tJuq_II2JCL3fP36q4rM-P_y52T22jPe-4jeaJ5n0-nnhnc1WM6byj"
"-J2x5X0qFj5N6dox76Bb7WfJARy66jK4JKjH8OqTJP; delPer=0; PSINO=1; BDRCVFR[gltLrB7qNCt]=mk3SLVN4HKm; "
"H_WISE_SIDS"
"=136721_138441_138434_128068_137657_135847_136436_120160_138490_137758_137978_132910_137690_131246_132552_137746_131518_118881_118877_118855_118837_118794_136688_107315_136431_138844_137901_136862_138147_138325_138114_136195_124621_137104_133847_138478_138343_137467_137734_131423_138663_137703_138607_110085_127969_138615_131953_137829_138274_127417_138313_136636_138425_138563_138942_138249_138302_138779; rsv_i=d6e9TNJb%2B3qKFQl8TUR%2BTZHvVqSR0wpofuwSqkQaewKiSq6vpJ4oYYAPIrNRiVRuqcIBsOHqnRRCn0DbP237jNis2u6sROs; FEED_SIDS=279036_1201_0; SE_LAUNCH=5%3A26252237_0%3A26252238; __yjsv5_shitong=1.0_7_5d9723b2e9549953a9853d661368336b7ae6_300_1575135783462_111.53.209.103_3a468be1; Hm_lvt_afd111fa62852d1f37001d1f980b6800=1575135802; Hm_lpvt_afd111fa62852d1f37001d1f980b6800=1575135802 ",
}
response = requests.post(url, data=data_dict, headers=headers_dict)
print(response)
print(response.content.decode())

After testing , Used this time headers And data Data is a must , Otherwise, it will be wrong immediately ！

The screenshot of crawling is as follows ：
The above is successful , Once the data changes , Will immediately report an error .
After comparison , When changing the original translation ,sign Change the following ：

 primary sign：289133.35420
present sign：410311.172534

because Cookie Too long , I won't show it again .
In a word, the reason is , Namely sign And Cookie.