Added filter enhancement option to remove keys from the response body

httpie/cli/argparser.py

@@ -18,7 +18,7 @@
 from .constants import (
     HTTP_GET, HTTP_POST, BASE_OUTPUT_OPTIONS, OUTPUT_OPTIONS, OUTPUT_OPTIONS_DEFAULT,
     OUTPUT_OPTIONS_DEFAULT_OFFLINE, OUTPUT_OPTIONS_DEFAULT_STDOUT_REDIRECTED,
-    OUT_RESP_BODY, PRETTY_MAP, PRETTY_STDOUT_TTY_ONLY, RequestType,
+    OUT_RESP_BODY, PRETTY_MAP, PRETTY_STDOUT_TTY_ONLY, FILTER_STDOUT_TTY_ONLY, RequestType,
     SEPARATOR_CREDENTIALS,
     SEPARATOR_GROUP_ALL_ITEMS, SEPARATOR_GROUP_DATA_ITEMS, URL_SCHEME_RE,
 )
@@ -172,6 +172,7 @@ def parse_args(
         self._setup_standard_streams()
         self._process_output_options()
         self._process_pretty_options()
+        self._process_filter_options()
         self._process_format_options()
         self._guess_method()
         self._parse_items()
@@ -539,6 +540,16 @@ def _process_pretty_options(self):
             # noinspection PyTypeChecker
             self.args.prettify = PRETTY_MAP[self.args.prettify]
 
+    def _process_filter_options(self):
+        if self.args.filtery == FILTER_STDOUT_TTY_ONLY:
+            pass
+        elif (self.args.filtery and self.env.is_windows
+              and self.args.output_file):
+            self.error('Only terminal output can be colorized on Windows.')
+        else:
+            # noinspection PyTypeChecker
+            pass
+
     def _process_download_options(self):
         if self.args.offline:
             self.args.download = False

httpie/cli/constants.py

@@ -105,6 +105,13 @@ class PrettyOptions(enum.Enum):
 }
 PRETTY_STDOUT_TTY_ONLY = PrettyOptions.STDOUT_TTY_ONLY
 
+# FILTER
+
+class FilterOptions(enum.Enum):
+    STDOUT_TTY_ONLY = enum.auto()
+
+FILTER_STDOUT_TTY_ONLY = FilterOptions.STDOUT_TTY_ONLY
+
 
 DEFAULT_FORMAT_OPTIONS = [
     'headers.sort:true',

httpie/cli/definition.py

@@ -13,6 +13,7 @@
                                   OUT_RESP_HEAD, OUT_RESP_META, OUTPUT_OPTIONS,
                                   OUTPUT_OPTIONS_DEFAULT, PRETTY_MAP,
                                   PRETTY_STDOUT_TTY_ONLY,
+                                  FILTER_STDOUT_TTY_ONLY,
                                   SEPARATOR_GROUP_ALL_ITEMS, SEPARATOR_PROXY,
                                   SORTED_FORMAT_OPTIONS_STRING,
                                   UNSORTED_FORMAT_OPTIONS_STRING, RequestType)
@@ -303,6 +304,20 @@ def format_style_help(available_styles, *, isolation_mode: bool = False):
 
     """,
 )
+
+output_processing.add_argument(
+    '--filter-keys',
+    dest='filtery',
+    default=FILTER_STDOUT_TTY_ONLY,
+    # choices=sorted(PRETTY_MAP.keys()),
+    short_help='Control the processing of console outputs.',
+    help="""
+    Controls output processing. Filters the comma separated
+    key values in the output json
+
+    """,
+)
+
 output_processing.add_argument(
     '--style',
     '-s',

httpie/output/models.py

@@ -2,7 +2,7 @@
 from typing import Any, Dict, Union, List, NamedTuple, Optional
 
 from httpie.context import Environment
-from httpie.cli.constants import PrettyOptions, PRETTY_MAP, PRETTY_STDOUT_TTY_ONLY
+from httpie.cli.constants import PrettyOptions, PRETTY_MAP, PRETTY_STDOUT_TTY_ONLY, FilterOptions, FILTER_STDOUT_TTY_ONLY
 from httpie.cli.argtypes import PARSED_DEFAULT_FORMAT_OPTIONS
 from httpie.output.formatters.colors import AUTO_STYLE
 
@@ -18,6 +18,7 @@ class ProcessingOptions(NamedTuple):
     stream: bool = False
     style: str = AUTO_STYLE
     prettify: Union[List[str], PrettyOptions] = PRETTY_STDOUT_TTY_ONLY
+    filtery: Union[List[str], FilterOptions] = FILTER_STDOUT_TTY_ONLY
 
     response_mime: Optional[str] = None
     response_charset: Optional[str] = None
@@ -30,6 +31,12 @@ def get_prettify(self, env: Environment) -> List[str]:
             return PRETTY_MAP['all' if env.stdout_isatty else 'none']
         else:
             return self.prettify
+
+    def get_filtery(self, env: Environment) -> List[str]:
+        if self.filtery is FILTER_STDOUT_TTY_ONLY:
+            return []
+        else:
+            return self.filtery.split(",")
 
     @classmethod
     def from_raw_args(cls, options: argparse.Namespace) -> 'ProcessingOptions':

httpie/output/streams.py

@@ -1,6 +1,6 @@
 from abc import ABCMeta, abstractmethod
 from itertools import chain
-from typing import Callable, Iterable, Optional, Union
+from typing import Callable, Iterable, List, Optional, Union
 
 from .processing import Conversion, Formatting
 from ..context import Environment
@@ -223,6 +223,109 @@ def process_body(self, chunk: Union[str, bytes]) -> bytes:
             chunk = self.decode_chunk(chunk)
         chunk = self.formatting.format_body(content=chunk, mime=self.mime)
         return smart_encode(chunk, self.output_encoding)
+
+class FilterStream(EncodedStream):
+
+    CHUNK_SIZE = 1
+
+    def __init__(
+        self, 
+        conversion: Conversion,
+        filter: List['str'],
+        **kwargs,
+    ):
+        super().__init__(**kwargs)
+        self.filters = filter
+        self.conversion = conversion
+
+    def get_headers(self) -> bytes:
+        return self.msg.headers.encode(self.output_encoding)
+
+
+    def get_metadata(self) -> bytes:
+        return self.msg.metadata.encode(self.output_encoding)
+
+
+    def iter_body(self) -> Iterable[bytes]:
+        first_chunk = True
+        iter_lines = self.msg.iter_lines(self.CHUNK_SIZE)
+        for line, lf in iter_lines:
+            if b'\0' in line:
+                if first_chunk:
+                    converter = self.conversion.get_converter(self.mime)
+                    if converter:
+                        body = bytearray()
+                        # noinspection PyAssignmentToLoopOrWithParameter
+                        for line, lf in chain([(line, lf)], iter_lines):
+                            body.extend(line)
+                            body.extend(lf)
+                        assert isinstance(body, str)
+                        yield self.process_body(body)
+                        return
+                raise BinarySuppressedError()
+            yield self.process_body(line) + lf
+            first_chunk = False
+
+    def process_body(self, chunk: Union[str, bytes]) -> bytes:
+        if not isinstance(chunk, str):
+            # Text when a converter has been used,
+            # otherwise it will always be bytes.
+            chunk = self.decode_chunk(chunk)
+        chunk_dict = eval(chunk)
+        for word in self.filters:
+            temp_dict = chunk_dict
+            splitwords = word.split(".")
+            for i in range(len(splitwords)-1):
+                subword = splitwords[i]
+                if subword in temp_dict:
+                    temp_dict = temp_dict[subword]
+                else:
+                    break
+            else:
+                subword = splitwords[-1]
+                if subword in temp_dict:
+                    del temp_dict[subword]
+        chunk = f'{chunk_dict}'
+        return smart_encode(chunk, self.output_encoding)
+
+
+class PrettyFilterStream(PrettyStream):
+
+    CHUNK_SIZE = 1
+
+    def __init__(
+        self, 
+        conversion: Conversion,
+        formatting: Formatting,
+        filter: List['str'],
+        **kwargs,
+    ):
+        super().__init__(conversion=conversion, formatting=formatting, **kwargs)
+        self.filters = filter
+
+    def process_body(self, chunk: Union[str, bytes]) -> bytes:
+        if not isinstance(chunk, str):
+            # Text when a converter has been used,
+            # otherwise it will always be bytes.
+            chunk = self.decode_chunk(chunk)
+        chunk_dict = eval(chunk)
+        for word in self.filters:
+            temp_dict = chunk_dict
+            splitwords = word.split(".")
+            for i in range(len(splitwords)-1):
+                subword = splitwords[i]
+                if subword in temp_dict:
+                    temp_dict = temp_dict[subword]
+                else:
+                    break
+            else:
+                subword = splitwords[-1]
+                if subword in temp_dict:
+                    del temp_dict[subword]
+        chunk = (f'{chunk_dict}').replace(" ", "").replace("'", '"')
+        chunk = self.formatting.format_body(content=chunk, mime=self.mime)
+        return smart_encode(chunk, self.output_encoding)
+
 
 
 class BufferedPrettyStream(PrettyStream):
@@ -252,3 +355,55 @@ def iter_body(self) -> Iterable[bytes]:
             self.mime, body = converter.convert(body)
 
         yield self.process_body(body)
+
+
+class PrettyBufferedFilterStream(PrettyFilterStream):
+
+    CHUNK_SIZE = 1024 * 10
+
+    def iter_body(self) -> Iterable[bytes]:
+        # Read the whole body before prettifying it,
+        # but bail out immediately if the body is binary.
+        converter = None
+        body = bytearray()
+
+        for chunk in self.msg.iter_body(self.CHUNK_SIZE):
+            if not converter and b'\0' in chunk:
+                converter = self.conversion.get_converter(self.mime)
+                if not converter:
+                    raise BinarySuppressedError()
+            body.extend(chunk)
+
+        if converter:
+            self.mime, body = converter.convert(body)
+
+        yield self.process_body(body)
+
+
+class BufferedFilterStream(FilterStream):
+    """The same as :class:`PrettyStream` except that the body is fully
+    fetched before it's processed.
+
+    Suitable regular HTTP responses.
+
+    """
+
+    CHUNK_SIZE = 1024 * 10
+
+    def iter_body(self) -> Iterable[bytes]:
+        # Read the whole body before prettifying it,
+        # but bail out immediately if the body is binary.
+        converter = None
+        body = bytearray()
+
+        for chunk in self.msg.iter_body(self.CHUNK_SIZE):
+            if not converter and b'\0' in chunk:
+                converter = self.conversion.get_converter(self.mime)
+                if not converter:
+                    raise BinarySuppressedError()
+            body.extend(chunk)
+
+        if converter:
+            self.mime, body = converter.convert(body)
+
+        yield self.process_body(body)

httpie/output/writer.py

@@ -15,7 +15,15 @@
 from .models import ProcessingOptions
 from .processing import Conversion, Formatting
 from .streams import (
-    BaseStream, BufferedPrettyStream, EncodedStream, PrettyStream, RawStream,
+    BaseStream,
+    BufferedPrettyStream,
+    EncodedStream,
+    PrettyStream,
+    RawStream,
+    FilterStream,
+    PrettyFilterStream,
+    PrettyBufferedFilterStream,
+    BufferedFilterStream,
 )
 from ..utils import parse_content_type_header
 
@@ -161,6 +169,7 @@ def get_stream_type_and_kwargs(
     """
     is_stream = processing_options.stream
     prettify_groups = processing_options.get_prettify(env)
+    filtery_groups = processing_options.get_filtery(env)
     if not is_stream and message_type is HTTPResponse:
         # If this is a response, then check the headers for determining
         # auto-streaming.
@@ -201,4 +210,14 @@ def get_stream_type_and_kwargs(
                 )
             })
 
+        if filtery_groups:
+            stream_class = FilterStream if is_stream else BufferedFilterStream
+            stream_kwargs.update({
+                'conversion': Conversion(),
+                'filter': filtery_groups
+            })
+
+        if prettify_groups and filtery_groups:
+            stream_class = PrettyFilterStream if is_stream else PrettyBufferedFilterStream
+
     return stream_class, stream_kwargs