github.com/cloudwego/hertz@v0.9.3/pkg/protocol/http1/ext/error.go (about)

     1  /*
     2   * Copyright 2022 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   *
    16   * The MIT License (MIT)
    17   *
    18   * Copyright (c) 2015-present Aliaksandr Valialkin, VertaMedia, Kirill Danshin, Erik Dubbelboer, FastHTTP Authors
    19   *
    20   * Permission is hereby granted, free of charge, to any person obtaining a copy
    21   * of this software and associated documentation files (the "Software"), to deal
    22   * in the Software without restriction, including without limitation the rights
    23   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    24   * copies of the Software, and to permit persons to whom the Software is
    25   * furnished to do so, subject to the following conditions:
    26   *
    27   * The above copyright notice and this permission notice shall be included in
    28   * all copies or substantial portions of the Software.
    29   *
    30   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    31   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    32   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    33   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    34   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    35   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    36   * THE SOFTWARE.
    37   *
    38   * This file may have been modified by CloudWeGo authors. All CloudWeGo
    39   * Modifications are Copyright 2022 CloudWeGo Authors.
    40   */
    41  
    42  package ext
    43  
    44  import (
    45  	"errors"
    46  	"fmt"
    47  	"io"
    48  
    49  	errs "github.com/cloudwego/hertz/pkg/common/errors"
    50  )
    51  
    52  var (
    53  	errNeedMore     = errs.New(errs.ErrNeedMore, errs.ErrorTypePublic, "cannot find trailing lf")
    54  	errBodyTooLarge = errs.New(errs.ErrBodyTooLarge, errs.ErrorTypePublic, "ext")
    55  )
    56  
    57  func HeaderError(typ string, err, errParse error, b []byte) error {
    58  	if !errors.Is(errParse, errs.ErrNeedMore) {
    59  		return headerErrorMsg(typ, errParse, b)
    60  	}
    61  	if err == nil {
    62  		return errNeedMore
    63  	}
    64  
    65  	// Buggy servers may leave trailing CRLFs after http body.
    66  	// Treat this case as EOF.
    67  	if isOnlyCRLF(b) {
    68  		return io.EOF
    69  	}
    70  
    71  	return headerErrorMsg(typ, err, b)
    72  }
    73  
    74  func headerErrorMsg(typ string, err error, b []byte) error {
    75  	return errs.NewPublic(fmt.Sprintf("error when reading %s headers: %s. Buffer size=%d, contents: %s", typ, err, len(b), BufferSnippet(b)))
    76  }