### Install httpx-secure

Source: https://github.com/zaczero/httpx-secure/blob/main/README.md

Installs the httpx-secure package using pip. This is the primary method for adding the library to your Python project.

```bash
pip install httpx-secure
```

--------------------------------

### Custom Domain Whitelisting with httpx-secure

Source: https://github.com/zaczero/httpx-secure/blob/main/README.md

Shows how to implement custom validation logic by providing a validator function to httpx_ssrf_protection. This example whitelists specific domains.

```python
import httpx
from httpx_secure import httpx_ssrf_protection
from ipaddress import IPv4Address, IPv6Address

def custom_validator(
    hostname: str,
    ip: IPv4Address | IPv6Address,
    port: int
) -> bool:
    return hostname in {
        "whitelisted.domain",
        "webhook.partner.com",
    }

client = httpx_ssrf_protection(
    httpx.AsyncClient(),
    custom_validator=custom_validator,
)

await client.get("https://whitelisted.domain")  # Allowed
await client.get("https://unknown.domain")      # Blocked
```

--------------------------------

### Basic SSRF Protection with httpx

Source: https://github.com/zaczero/httpx-secure/blob/main/README.md

Demonstrates how to wrap an httpx.AsyncClient with httpx_ssrf_protection for basic SSRF blocking. It includes configuration for DNS caching.

```python
import httpx
from httpx_secure import httpx_ssrf_protection

client = httpx_ssrf_protection(
    httpx.AsyncClient(),
    dns_cache_size=1000,  # Cache up to 1000 DNS resolutions
    dns_cache_ttl=600,    # Cache for 10 minutes
)

await client.get("https://public.domain")   # Allowed
await client.get("https://private.domain")  # Blocked
```

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