After obtaining the successfully recognized `gRecaptchaResponse` value through the API, if you are using simulation software, such as selenium, you need to execute a callback function to tell the webpage that we have successfully recognized, so let's learn how to find this function:
Note: In some cases, there is indeed no callback function. In this case, you can directly assign values to the g-recaptcha-response container and submit the form.
## Search by automatic search function
Press F12 to enter the `Console`, and enter the following auto-defined function `findRecaptchaClients()`
```javascript
function findRecaptchaClients() {
// eslint-disable-next-line camelcase
if (typeof (___grecaptcha_cfg) !== 'undefined') {
// eslint-disable-next-line camelcase, no-undef
return Object.entries(___grecaptcha_cfg.clients).map(([cid, client]) => {
const data = { id: cid, version: cid >= 10000 ? 'V3' : 'V2' }
const objects = Object.entries(client).filter(([_, value]) => value && typeof value === 'object')
objects.forEach(([toplevelKey, toplevel]) => {
const found = Object.entries(toplevel).find(([_, value]) => (
value && typeof value === 'object' && 'sitekey' in value && 'size' in value
))
if (typeof toplevel === 'object' && toplevel instanceof HTMLElement && toplevel['tagName'] === 'DIV') {
data.pageurl = toplevel.baseURI
}
if (found) {
const [sublevelKey, sublevel] = found
data.sitekey = sublevel.sitekey
const callbackKey = data.version === 'V2' ? 'callback' : 'promise-callback'
const callback = sublevel[callbackKey]
if (!callback) {
data.callback = null
data.function = null
} else {
data.function = callback
const keys = [cid, toplevelKey, sublevelKey, callbackKey].map((key) => `['${key}']`).join('')
data.callback = `___grecaptcha_cfg.clients${keys}`
}
}
})
return data
})
}
return []
}
findRecaptchaClients && findRecaptchaClients()
```
Then execute this function `findRecaptchaClients()` in `console` to find the corresponding function
### Case 1: If the value of the `function` returns a string value
funtion is "verifyDemoRecaptcha"
As you can see, our callback function here is `verifyDemoRecaptcha`, and then we only need to execute this function in selenium.
```python
driver.execute_script(f'verifyDemoRecaptcha("{gRecaptchaResponse}")')
```
We can test this case on the website:
### Case 2: If the value of the `function` returns a function
function is funtion
For this kind of anonymous function, we only need to execute it according to the complete path we just found, and the effect is the same, for example:
```javascript
___grecaptcha_cfg.clients['0']['M']['M'].callback('{gRecaptchaResponse}')
```
We can test this case on the website:
---
# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://beta-4.gitbook.io/betacaptcha-docs/shared-documents/find-the-callback-function-of-recaptcha.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.