from dataclasses import dataclass
from typing import Any
import extism
import json
class HostFunctionError(Exception):
"""Raised when a host function returns an error."""
pass
@extism.import_fn("extism:host/user", "http_send")
def _http_send(offset: int) -> int:
"""Raw host function - do not call directly."""
...
def http_send(request: Any) -> Any:
"""Send executes an HTTP request and returns the response.
Parameters:
- request: The HTTP request to execute, including method, URL, headers, body, and timeout
Returns the HTTP response with status code, headers, and body.
Network errors, timeouts, and permission failures are returned as errors.
Successful HTTP calls (including 4xx/5xx status codes) return a non-nil response with nil error.
Args:
request: Any parameter.
Returns:
Any: The result value.
Raises:
HostFunctionError: If the host function returns an error.
"""
request = {
"request": request,
}
request_bytes = json.dumps(request).encode("utf-8")
request_mem = extism.memory.alloc(request_bytes)
response_offset = _http_send(request_mem.offset)
response_mem = extism.memory.find(response_offset)
response = json.loads(extism.memory.string(response_mem))
if response.get("error"):
raise HostFunctionError(response["error"])
return response.get("result", None)