plugins/authproxy/utils.cc

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "utils.h"

#include <string>
#include <cstring>
#include <cstdlib>
#include <cstdio>

#include <getopt.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <string_view>

DbgCtl Auth_dbg_ctl{"authproxy"};

void
HttpDebugHeader(TSMBuffer mbuf, TSMLoc mhdr)
{
  HttpIoBuffer    iobuf;
  int64_t         nbytes;
  int64_t         avail;
  const char     *ptr;
  TSIOBufferBlock blk;

  TSHttpHdrPrint(mbuf, mhdr, iobuf.buffer);

  blk   = TSIOBufferReaderStart(iobuf.reader);
  avail = TSIOBufferBlockReadAvail(blk, iobuf.reader);
  ptr   = TSIOBufferBlockReadStart(blk, iobuf.reader, &nbytes);

  AuthLogDebug("http request (%u of %u bytes):\n%*.*s", (unsigned)nbytes, (unsigned)avail, (int)nbytes, (int)nbytes, ptr);
}

void
HttpSetMimeHeader(TSMBuffer mbuf, TSMLoc mhdr, const char *name, unsigned value)
{
  TSMLoc mloc;

  mloc = TSMimeHdrFieldFind(mbuf, mhdr, name, -1);
  if (mloc == TS_NULL_MLOC) {
    TSReleaseAssert(TSMimeHdrFieldCreateNamed(mbuf, mhdr, name, -1, &mloc) == TS_SUCCESS);
  } else {
    TSReleaseAssert(TSMimeHdrFieldValuesClear(mbuf, mhdr, mloc) == TS_SUCCESS);
  }

  TSReleaseAssert(TSMimeHdrFieldValueUintInsert(mbuf, mhdr, mloc, 0 /* index */, value) == TS_SUCCESS);
  TSReleaseAssert(TSMimeHdrFieldAppend(mbuf, mhdr, mloc) == TS_SUCCESS);

  TSHandleMLocRelease(mbuf, mhdr, mloc);
}

void
HttpSetMimeHeader(TSMBuffer mbuf, TSMLoc mhdr, const char *name, const char *value)
{
  TSMLoc mloc;

  mloc = TSMimeHdrFieldFind(mbuf, mhdr, name, -1);
  if (mloc == TS_NULL_MLOC) {
    TSReleaseAssert(TSMimeHdrFieldCreateNamed(mbuf, mhdr, name, -1, &mloc) == TS_SUCCESS);
  } else {
    TSReleaseAssert(TSMimeHdrFieldValuesClear(mbuf, mhdr, mloc) == TS_SUCCESS);
  }

  TSReleaseAssert(TSMimeHdrFieldValueStringInsert(mbuf, mhdr, mloc, 0 /* index */, value, -1) == TS_SUCCESS);
  TSReleaseAssert(TSMimeHdrFieldAppend(mbuf, mhdr, mloc) == TS_SUCCESS);

  TSHandleMLocRelease(mbuf, mhdr, mloc);
}

void
HttpSetMimeHeader(TSMBuffer mbuf, TSMLoc mhdr, const std::string_view name, const std::string_view value)
{
  TSMLoc mloc;
  mloc = TSMimeHdrFieldFind(mbuf, mhdr, name.data(), name.size());
  if (mloc == TS_NULL_MLOC) {
    TSReleaseAssert(TSMimeHdrFieldCreateNamed(mbuf, mhdr, name.data(), name.size(), &mloc) == TS_SUCCESS);
  } else {
    TSReleaseAssert(TSMimeHdrFieldValuesClear(mbuf, mhdr, mloc) == TS_SUCCESS);
  }

  TSReleaseAssert(TSMimeHdrFieldValueStringInsert(mbuf, mhdr, mloc, 0 /* index */, value.data(), value.size()) == TS_SUCCESS);
  TSReleaseAssert(TSMimeHdrFieldAppend(mbuf, mhdr, mloc) == TS_SUCCESS);

  TSHandleMLocRelease(mbuf, mhdr, mloc);
}

void
HttpRemoveMimeHeader(TSMBuffer mbuf, TSMLoc mhdr, const char *name)
{
  TSMLoc mloc;

  // A field may be repeated on multiple lines; destroy every instance.
  while ((mloc = TSMimeHdrFieldFind(mbuf, mhdr, name, -1)) != TS_NULL_MLOC) {
    TSReleaseAssert(TSMimeHdrFieldDestroy(mbuf, mhdr, mloc) == TS_SUCCESS);
    TSHandleMLocRelease(mbuf, mhdr, mloc);
  }
}

unsigned
HttpGetContentLength(TSMBuffer mbuf, TSMLoc mhdr)
{
  TSMLoc   mloc;
  unsigned value = 0;

  mloc = TSMimeHdrFieldFind(mbuf, mhdr, TS_MIME_FIELD_CONTENT_LENGTH, -1);
  if (mloc != TS_NULL_MLOC) {
    value = TSMimeHdrFieldValueUintGet(mbuf, mhdr, mloc, 0 /* index */);
  }

  TSHandleMLocRelease(mbuf, mhdr, mloc);
  return value;
}

bool
HttpIsChunkedEncoding(TSMBuffer mbuf, TSMLoc mhdr)
{
  TSMLoc mloc;
  bool   ischunked = false;

  mloc = TSMimeHdrFieldFind(mbuf, mhdr, TS_MIME_FIELD_TRANSFER_ENCODING, -1);
  if (mloc != TS_NULL_MLOC) {
    const char *str;
    int         len;

    str = TSMimeHdrFieldValueStringGet(mbuf, mhdr, mloc, -1 /* index */, &len);
    if (str && len) {
      ischunked = (strncmp("chunked", str, len) == 0);
    }
  }

  TSHandleMLocRelease(mbuf, mhdr, mloc);
  return ischunked;
}

// vim: set ts=4 sw=4 et :