forked from extern/httpie-cli
261 lines
8.2 KiB
Python
261 lines
8.2 KiB
Python
"""This module provides the main functionality of HTTPie.
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Invocation flow:
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1. Read, validate and process the input (args, `stdin`).
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2. Create and send a request.
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3. Stream, and possibly process and format, the parts
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of the request-response exchange selected by output options.
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4. Simultaneously write to `stdout`
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5. Exit.
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"""
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import sys
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import errno
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import platform
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import requests
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from requests import __version__ as requests_version
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from pygments import __version__ as pygments_version
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from httpie import __version__ as httpie_version, ExitStatus
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from httpie.compat import str, bytes, is_py3
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from httpie.client import get_response
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from httpie.downloads import Downloader
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from httpie.context import Environment
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from httpie.plugins import plugin_manager
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from httpie.output.streams import (
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build_output_stream,
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write_stream,
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write_stream_with_colors_win_py3
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)
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def get_exit_status(http_status, follow=False):
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"""Translate HTTP status code to exit status code."""
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if 300 <= http_status <= 399 and not follow:
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# Redirect
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return ExitStatus.ERROR_HTTP_3XX
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elif 400 <= http_status <= 499:
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# Client Error
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return ExitStatus.ERROR_HTTP_4XX
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elif 500 <= http_status <= 599:
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# Server Error
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return ExitStatus.ERROR_HTTP_5XX
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else:
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return ExitStatus.OK
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def print_debug_info(env):
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env.stderr.writelines([
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'HTTPie %s\n' % httpie_version,
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'Requests %s\n' % requests_version,
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'Pygments %s\n' % pygments_version,
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'Python %s\n%s\n' % (sys.version, sys.executable),
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'%s %s' % (platform.system(), platform.release()),
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])
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env.stderr.write('\n\n')
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env.stderr.write(repr(env))
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env.stderr.write('\n')
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def decode_args(args, stdin_encoding):
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"""
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Convert all bytes args to str
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by decoding them using stdin encoding.
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"""
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return [
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arg.decode(stdin_encoding)
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if type(arg) == bytes else arg
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for arg in args
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]
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def program(args, env, log_error):
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"""
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The main program without error handling
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:param args: parsed args (argparse.Namespace)
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:type env: Environment
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:param log_error: error log function
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:return: status code
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"""
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exit_status = ExitStatus.OK
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downloader = None
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show_traceback = args.debug or args.traceback
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try:
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if args.download:
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args.follow = True # --download implies --follow.
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downloader = Downloader(
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output_file=args.output_file,
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progress_file=env.stderr,
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resume=args.download_resume
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)
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downloader.pre_request(args.headers)
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final_response = get_response(args, config_dir=env.config.directory)
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if args.all:
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responses = final_response.history + [final_response]
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else:
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responses = [final_response]
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for response in responses:
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if args.check_status or downloader:
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exit_status = get_exit_status(
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http_status=response.status_code,
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follow=args.follow
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)
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if not env.stdout_isatty and exit_status != ExitStatus.OK:
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log_error(
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'HTTP %s %s', response.raw.status, response.raw.reason,
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level='warning'
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)
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write_stream_kwargs = {
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'stream': build_output_stream(
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args=args,
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env=env,
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request=response.request,
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response=response,
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output_options=(
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args.output_options
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if response is final_response
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else args.output_options_history
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)
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),
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# NOTE: `env.stdout` will in fact be `stderr` with `--download`
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'outfile': env.stdout,
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'flush': env.stdout_isatty or args.stream
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}
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try:
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if env.is_windows and is_py3 and 'colors' in args.prettify:
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write_stream_with_colors_win_py3(**write_stream_kwargs)
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else:
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write_stream(**write_stream_kwargs)
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except IOError as e:
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if not show_traceback and e.errno == errno.EPIPE:
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# Ignore broken pipes unless --traceback.
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env.stderr.write('\n')
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else:
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raise
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if downloader and exit_status == ExitStatus.OK:
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# Last response body download.
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download_stream, download_to = downloader.start(final_response)
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write_stream(
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stream=download_stream,
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outfile=download_to,
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flush=False,
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)
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downloader.finish()
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if downloader.interrupted:
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exit_status = ExitStatus.ERROR
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log_error('Incomplete download: size=%d; downloaded=%d' % (
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downloader.status.total_size,
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downloader.status.downloaded
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))
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return exit_status
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finally:
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if downloader and not downloader.finished:
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downloader.failed()
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if (not isinstance(args, list) and args.output_file and
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args.output_file_specified):
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args.output_file.close()
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def main(args=sys.argv[1:], env=Environment(), custom_log_error=None):
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"""
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The main function.
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Pre-process args, handle some special types of invocations,
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and run the main program with error handling.
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Return exit status code.
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"""
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args = decode_args(args, env.stdin_encoding)
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plugin_manager.load_installed_plugins()
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def log_error(msg, *args, **kwargs):
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msg = msg % args
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level = kwargs.get('level', 'error')
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assert level in ['error', 'warning']
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env.stderr.write('\nhttp: %s: %s\n' % (level, msg))
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from httpie.cli import parser
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if env.config.default_options:
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args = env.config.default_options + args
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if custom_log_error:
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log_error = custom_log_error
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include_debug_info = '--debug' in args
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include_traceback = include_debug_info or '--traceback' in args
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if include_debug_info:
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print_debug_info(env)
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if args == ['--debug']:
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return ExitStatus.OK
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exit_status = ExitStatus.OK
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try:
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parsed_args = parser.parse_args(args=args, env=env)
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except KeyboardInterrupt:
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env.stderr.write('\n')
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if include_traceback:
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raise
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exit_status = ExitStatus.ERROR_CTRL_C
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except SystemExit as e:
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if e.code != ExitStatus.OK:
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env.stderr.write('\n')
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if include_traceback:
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raise
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exit_status = ExitStatus.ERROR
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else:
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try:
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exit_status = program(
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args=parsed_args,
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env=env,
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log_error=log_error,
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)
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except KeyboardInterrupt:
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env.stderr.write('\n')
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if include_traceback:
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raise
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exit_status = ExitStatus.ERROR_CTRL_C
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except SystemExit as e:
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if e.code != ExitStatus.OK:
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env.stderr.write('\n')
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if include_traceback:
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raise
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exit_status = ExitStatus.ERROR
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except requests.Timeout:
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exit_status = ExitStatus.ERROR_TIMEOUT
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log_error('Request timed out (%ss).', parsed_args.timeout)
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except requests.TooManyRedirects:
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exit_status = ExitStatus.ERROR_TOO_MANY_REDIRECTS
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log_error('Too many redirects (--max-redirects=%s).',
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parsed_args.max_redirects)
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except Exception as e:
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# TODO: Further distinction between expected and unexpected errors.
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msg = str(e)
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if hasattr(e, 'request'):
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request = e.request
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if hasattr(request, 'url'):
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msg += ' while doing %s request to URL: %s' % (
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request.method, request.url)
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log_error('%s: %s', type(e).__name__, msg)
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if include_traceback:
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raise
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exit_status = ExitStatus.ERROR
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return exit_status
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