Contact telegram

本文目录导读：

1. 目录导读：
2. Telegram Contact API Overview
3. Supported Features and Methods
4. Authentication and Permissions
5. Error Handling and Retry Mechanisms
6. Example Code Snippets
7. Conclusion

Telegram Contact API Documentation

目录导读：

• Telegram Contact API Overview
  • What is Telegram Contact API?
  • Purpose of the Telegram Contact API
• Supported Features and Methods
  • Get User Contact Information
  • Manage User Contacts (Add/Remove)
  • Send Message to a Contact
  • Retrieve Messages from a Contact
  • Other Advanced Features
• Authentication and Permissions
  • Basic Authentication
  • OAuth2 for Enhanced Security
  • Access Levels and Roles
• Error Handling and Retry Mechanisms
  • Common Errors and Their Causes
  • Implementing Retry Strategies
• Example Code Snippets
  • Python Example
  • Node.js Example
  • Java Example
  • C# Example
• Conclusion
  • Summary of Key Points
  • Next Steps for Developers

---

Telegram Contact API Overview

What is Telegram Contact API?

The Telegram Contact API allows developers to interact with user contacts on Telegram through various endpoints. This API enables applications to retrieve contact information such as phone numbers, email addresses, and other details about users in their messaging system.

Purpose of the Telegram Contact API

The primary purpose of the Telegram Contact API is to provide an efficient way for applications to manage user profiles, facilitate communication between users, and offer additional features like sending messages directly to specific contacts.

---

Supported Features and Methods

Get User Contact Information

To fetch detailed contact information, you can use the GET /contacts/{contact_id} endpoint:

GET https://api.telegram.org/bot<API_TOKEN>/contacts/{contact_id}

Replace <API_TOKEN> with your bot's token obtained via BotFather and {contact_id} with the unique identifier for the desired contact.

Response Example:

{
    "ok": true,
    "result": {
        "id": 1234567890,
        "first_name": "John",
        "last_name": "Doe",
        "phone_number": "+1234567890",
        "email": "john.doe@example.com"
    }
}

Manage User Contacts (Add/Remove)

To add or remove a contact, use the following methods:

Add a New Contact

Use the POST /contacts endpoint to add new contacts:

POST https://api.telegram.org/bot<API_TOKEN>/contacts
Content-Type: application/json
{
    "phone_number": "+1234567890",
    "first_name": "John",
    "last_name": "Doe"
}

Remove a Contact

To remove a contact, send a request to the /contacts/{contact_id}/delete endpoint:

DELETE https://api.telegram.org/bot<API_TOKEN>/contacts/{contact_id}

Replace {contact_id} with the ID of the contact you wish to delete.

Send Message to a Contact

Once a message recipient is identified (e.g., a contact), you can send them a message using the /sendMessage method:

POST https://api.telegram.org/bot<API_TOKEN>/sendMessage
Content-Type: application/json
{
    "chat_id": "-1234567890",  // Replace with actual chat ID
    "text": "Hello John!"
}

Replace -1234567890 with the appropriate chat ID for the recipient.

Retrieve Messages from a Contact

To retrieve messages sent to a contact, use the /messages endpoint:

GET https://api.telegram.org/bot<API_TOKEN>/messages?limit=10&offset=0

Specify limit to control the number of messages returned per request. The offset parameter helps paginate through large datasets.

Response Example:

[
    {
        "message_id": 123456,
        "from": {
            "id": 1234567890,
            "first_name": "John",
            "last_name": "Doe"
        },
        "date": 1609459200,
        "text": "Hello World!"
    },
    ...
]

---

Authentication and Permissions

Basic Authentication

For simplicity, basic authentication is straightforward but not recommended for production environments due to security concerns. Use this method when testing or developing locally.

import requests
response = requests.get('https://api.telegram.org/bot<API_TOKEN>/getUpdates')
print(response.json())

OAuth2 for Enhanced Security

OAuth2 provides more robust authentication mechanisms suitable for secure applications. First, obtain an access token by registering your application at the official Telegram developer portal.

import requests
access_token = '<YOUR_ACCESS_TOKEN>'
url = f'https://api.telegram.org/bot{access_token}/sendMessage'
data = {'chat_id': '-1234567890', 'text': 'Hello, world!'}
response = requests.post(url, json=data)
print(response.status_code)
print(response.text)

---

Error Handling and Retry Mechanisms

When working with asynchronous APIs, handling errors and implementing retry strategies is crucial. Here’s how to handle common issues:

Common Errors

• Unauthorized: Ensure you have valid credentials.
• Bad Request: Check input parameters; they should be formatted correctly.
• Service Unavailable: Wait a short period before attempting another call.

Implementing Retry Mechanisms

• Exponential Backoff: Start with a small delay and gradually increase it.
• Randomization: Avoid hitting rate limits by adding randomness to delays.
• Circuit Breaker: Implement logic that detects and resets failed calls temporarily.

Example code snippet demonstrating exponential backoff:

import time
import random
def make_request():
    response = requests.get('https://api.telegram.org/bot<YOUR_BOT_TOKEN>/getUpdates')
    if response.status_code == 200:
        return response.json()
    else:
        raise Exception(f'Request failed with status {response.status_code}')
while True:
    try:
        result = make_request()
        break
    except Exception as e:
        print(e)
        time.sleep(random.expovariate(1.0))
        continue

---

Example Code Snippets

Here are examples showing how to integrate Telegram Contact API functionality into different programming languages:

Python Example

import requests
def get_contact_info(contact_id):
    url = f"https://api.telegram.org/bot<YOUR_BOT_TOKEN>/contacts/{contact_id}"
    response = requests.get(url)
    return response.json()
def main():
    # Example usage
    info = get_contact_info("12345")
    print(info)
if __name__ == "__main__":
    main()

Node.js Example

const axios = require('axios');
async function getContactInfo(contactId) {
    const res = await axios({
        method: 'GET',
        url: `https://api.telegram.org/bot${process.env.TELEGRAM_API_KEY}/contacts/${contactId}`
    });
    return res.data;
}
(async () => {
    const contactInfo = await getContactInfo("12345");
    console.log(contactInfo);
})();

Java Example

import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;
public class TelegramContactApi {
    public static void main(String[] args) throws Exception {
        String apiKey = "<YOUR_TELEGRAM_API_KEY>";
        Long contactId = 12345L;
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity<Object> response = restTemplate.getForEntity(
                "https://api.telegram.org/bot" + apiKey + "/contacts/" + contactId,
                Object.class);
        System.out.println(response.getBody());
    }
}

C# Example

using System;
using System.Net.Http;
using System.Threading.Tasks;
class Program
{
    static async Task Main(string[] args)
    {
        string apiKey = "<YOUR_TELEGRAM_API_KEY>";
        long contactId = 12345L;
        var client = new HttpClient();
        HttpResponseMessage response = await client.GetAsync($"https://api.telegram.org/bot{apiKey}/contacts/{contactId}");
        if (response.IsSuccessStatusCode)
        {
            var content = await response.Content.ReadAsStringAsync();
            Console.WriteLine(content);
        }
        else
        {
            Console.WriteLine($"Error: {response.StatusCode}");
        }
    }
}

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Conclusion

The Telegram Contact API offers powerful tools for managing and interacting with Telegram user profiles. Whether you're building a mobile app, web service, or any other platform where direct communication with users is required, leveraging these capabilities will significantly enhance your application's functionality. Always ensure compliance with Telegram’s guidelines and terms of service while integrating third-party services like Telegram into your development process.