Implement brep-monitor

1 files changed, 0 insertions, 1005 deletions

diff --git a/web/apache/request.cxx b/web/apache/request.cxx
deleted file mode 100644
index 4722b7f..0000000
--- a/web/apache/request.cxx
+++ /dev/null
@@ -1,1005 +0,0 @@
-// file      : web/apache/request.cxx -*- C++ -*-
-// license   : MIT; see accompanying LICENSE file
-
-#include <web/apache/request.hxx>
-
-#include <apr.h>         // APR_SIZE_MAX
-#include <apr_errno.h>   // apr_status_t, APR_SUCCESS, APR_E*, apr_strerror()
-#include <apr_tables.h>  // apr_table_*, apr_table_*(), apr_array_header_t
-#include <apr_strings.h> // apr_pstrdup()
-#include <apr_buckets.h> // apr_bucket*, apr_bucket_*(), apr_brigade_*(),
-                         // APR_BRIGADE_*()
-
-#include <httpd.h>         // request_rec, HTTP_*, OK
-#include <http_protocol.h> // ap_*()
-
-#include <apreq2/apreq.h>        // APREQ_*
-#include <apreq2/apreq_util.h>   // apreq_brigade_copy()
-#include <apreq2/apreq_param.h>  // apreq_param_t, apreq_value_to_param()
-#include <apreq2/apreq_parser.h> // apreq_parser_t, apreq_parser_make()
-
-#include <ctime>     // strftime(), time_t
-#include <vector>
-#include <chrono>
-#include <memory>    // unique_ptr
-#include <string>
-#include <cassert>
-#include <ostream>
-#include <istream>
-#include <cstring>   // str*(), memcpy(), size_t
-#include <utility>   // move()
-#include <iterator>  // istreambuf_iterator
-#include <stdexcept> // invalid_argument, runtime_error
-#include <exception> // current_exception()
-#include <streambuf>
-#include <algorithm> // min()
-
-#include <libbutl/utility.mxx>   // icasecmp()
-#include <libbutl/optional.mxx>
-#include <libbutl/timestamp.mxx>
-
-#include <web/mime-url-encoding.hxx>
-
-using namespace std;
-using namespace butl;
-
-namespace web
-{
-  namespace apache
-  {
-    [[noreturn]] static void
-    throw_internal_error (apr_status_t s, const string& what)
-    {
-      char buf[1024];
-      throw runtime_error (what + ": " + apr_strerror (s, buf, sizeof (buf)));
-    }
-
-    // Extend the Apache stream with checking for the read limit and caching
-    // the content if requested. Replay the cached content after rewind.
-    //
-    class istreambuf_cache: public istreambuf
-    {
-      enum class mode
-      {
-        cache,  // Read from Apache stream, save the read data into the cache.
-        replay, // Read from the cache.
-        proxy   // Read from Apache stream (don't save into the cache).
-      };
-
-    public:
-      istreambuf_cache (size_t read_limit, size_t cache_limit,
-                        request_rec* r,
-                        stream_state& s,
-                        size_t bufsize = 1024,
-                        size_t putback = 1)
-          : istreambuf (r, s, bufsize, putback),
-            read_limit_ (read_limit),
-            cache_limit_ (cache_limit)
-      {
-      }
-
-      void
-      rewind ()
-      {
-        // Fail if some content is already missed in the cache.
-        //
-        if (mode_ == mode::proxy)
-          throw sequence_error (
-            string ("web::apache::istreambuf_cache::rewind: ") +
-            (cache_limit_ > 0
-             ? "half-buffered"
-             : "unbuffered"));
-
-        mode_ = mode::replay;
-        replay_pos_ = 0;
-        setg (nullptr, nullptr, nullptr);
-      }
-
-      void
-      limits (size_t read_limit, size_t cache_limit)
-      {
-        if (read_limit > 0)
-          read_limit_ = read_limit;
-
-        if (cache_limit > 0)
-        {
-          // We can not increase the cache limit if some content is already
-          // missed in the cache.
-          //
-          if (cache_limit > cache_limit_ && mode_ == mode::proxy)
-            throw sequence_error (
-              "web::apache::istreambuf_cache::limits: unbuffered");
-
-          cache_limit_ = cache_limit;
-        }
-      }
-
-      size_t read_limit  () const noexcept {return read_limit_;}
-      size_t cache_limit () const noexcept {return cache_limit_;}
-
-    private:
-      virtual int_type
-      underflow ();
-
-    private:
-      // Limits
-      //
-      size_t read_limit_;
-      size_t cache_limit_;
-
-      // State
-      //
-      mode mode_ = mode::cache;
-      size_t read_bytes_ = 0;
-      bool eof_ = false;        // End of Apache stream is reached.
-
-      // Cache
-      //
-      struct chunk
-      {
-        vector<char> data;
-        size_t offset;
-
-        chunk (vector<char>&& d, size_t o): data (move (d)), offset (o) {}
-
-        // Make the type move constructible-only to avoid copying of chunks on
-        // vector growth.
-        //
-        chunk (chunk&&) = default;
-      };
-
-      vector<chunk> cache_;
-      size_t cache_size_ = 0;
-      size_t replay_pos_ = 0;
-    };
-
-    istreambuf_cache::int_type istreambuf_cache::
-    underflow ()
-    {
-      if (gptr () < egptr ())
-        return traits_type::to_int_type (*gptr ());
-
-      if (mode_ == mode::replay)
-      {
-        if (replay_pos_ < cache_.size ())
-        {
-          chunk& ch (cache_[replay_pos_++]);
-          char*  p  (ch.data.data ());
-          setg (p, p + ch.offset, p + ch.data.size ());
-          return traits_type::to_int_type (*gptr ());
-        }
-
-        // No more data to replay, so switch to the cache mode. That includes
-        // resetting eback, gptr and egptr, so they point into the istreambuf's
-        // internal buffer. Putback area should also be restored.
-        //
-        mode_ = mode::cache;
-
-        // Bail out if the end of stream is reached.
-        //
-        if (eof_)
-          return traits_type::eof ();
-
-        char* p (buf_.data () + putback_);
-        size_t pb (0);
-
-        // Restore putback area if there is any cached data. Thanks to
-        // istreambuf, it's all in a single chunk.
-        //
-        if (!cache_.empty ())
-        {
-          chunk& ch (cache_.back ());
-          pb = min (putback_, ch.data.size ());
-          memcpy (p - pb, ch.data.data () + ch.data.size () - pb, pb);
-        }
-
-        setg (p - pb, p, p);
-      }
-
-      // Delegate reading to the base class in the cache or proxy modes, but
-      // check for the read limit first.
-      //
-      if (read_limit_ && read_bytes_ >= read_limit_)
-        throw invalid_request (HTTP_REQUEST_ENTITY_TOO_LARGE,
-                               "payload too large");
-
-      // Throws the sequence_error exception if some unbuffered content is
-      // already written.
-      //
-      int_type r (istreambuf::underflow ());
-
-      if (r == traits_type::eof ())
-      {
-        eof_ = true;
-        return r;
-      }
-
-      // Increment the read bytes counter.
-      //
-      size_t rb (egptr () - gptr ());
-      read_bytes_ += rb;
-
-      // In the cache mode save the read data if the cache limit is not
-      // reached, otherwise switch to the proxy mode.
-      //
-      if (mode_ == mode::cache)
-      {
-        // Not to complicate things we will copy the buffer into the cache
-        // together with the putback area, which is OK as it usually takes a
-        // small fraction of the buffer. By the same reason we will cache the
-        // whole data read even though we can exceed the limits by
-        // bufsize - putback - 1 bytes.
-        //
-        if (cache_size_ < cache_limit_)
-        {
-          chunk ch (vector<char> (eback (), egptr ()),
-                    static_cast<size_t> (gptr () - eback ()));
-
-          cache_.emplace_back (move (ch));
-          cache_size_ += rb;
-        }
-        else
-          mode_ = mode::proxy;
-      }
-
-      return r;
-    }
-
-    // Stream interface for reading from the Apache's bucket brigade. Put back
-    // is not supported.
-    //
-    // Note that reading from a brigade bucket modifies the brigade in the
-    // general case. For example, reading from a file bucket adds a new heap
-    // bucket before the file bucket on every read. Traversing/reading through
-    // such a bucket brigade effectively loads the whole file into the memory,
-    // so the subsequent brigade traversal results in iterating over the
-    // loaded heap buckets.
-    //
-    // To avoid such a behavior we will make a shallow copy of the original
-    // bucket brigade, initially and for each rewind. Then, instead of
-    // iterating, we will always read from the first bucket removing it after
-    // the use.
-    //
-    class istreambuf_buckets: public streambuf
-    {
-    public:
-      // The bucket brigade must exist during the object's lifetime.
-      //
-      explicit
-      istreambuf_buckets (const apr_bucket_brigade* bs)
-          : orig_buckets_ (bs),
-            buckets_ (apr_brigade_create (bs->p, bs->bucket_alloc))
-
-      {
-        if (buckets_ == nullptr)
-          throw_internal_error (APR_ENOMEM, "apr_brigade_create");
-
-        rewind (); // Copy the original buckets.
-      }
-
-      void
-      rewind ()
-      {
-        // Note that apreq_brigade_copy() appends buckets to the destination,
-        // so we clean it up first.
-        //
-        apr_status_t r (apr_brigade_cleanup (buckets_.get ()));
-        if (r != APR_SUCCESS)
-          throw_internal_error (r, "apr_brigade_cleanup");
-
-        r = apreq_brigade_copy (
-          buckets_.get (),
-          const_cast<apr_bucket_brigade*> (orig_buckets_));
-
-        if (r != APR_SUCCESS)
-          throw_internal_error (r, "apreq_brigade_copy");
-
-        setg (nullptr, nullptr, nullptr);
-      }
-
-    private:
-      virtual int_type
-      underflow ()
-      {
-        if (gptr () < egptr ())
-          return traits_type::to_int_type (*gptr ());
-
-        // If the get-pointer is not NULL then it points to the data referred
-        // by the first brigade bucket. As we will bail out or rewrite such a
-        // pointer now there is no need for the bucket either, so we can
-        // safely delete it.
-        //
-        if (gptr () != nullptr)
-        {
-          assert (!APR_BRIGADE_EMPTY (buckets_));
-
-          // Note that apr_bucket_delete() is a macro and the following
-          // call ends up badly (with SIGSEGV).
-          //
-          // apr_bucket_delete (APR_BRIGADE_FIRST (buckets_));
-          //
-          apr_bucket* b (APR_BRIGADE_FIRST (buckets_));
-          apr_bucket_delete (b);
-        }
-
-        if (APR_BRIGADE_EMPTY (buckets_))
-          return traits_type::eof ();
-
-        apr_size_t n;
-        const char* d;
-        apr_bucket* b (APR_BRIGADE_FIRST (buckets_));
-        apr_status_t r (apr_bucket_read (b, &d, &n, APR_BLOCK_READ));
-
-        if (r != APR_SUCCESS)
-          throw_internal_error (r, "apr_bucket_read");
-
-        char* p (const_cast<char*> (d));
-        setg (p, p, p + n);
-        return traits_type::to_int_type (*gptr ());
-      }
-
-    private:
-      const apr_bucket_brigade* orig_buckets_;
-
-      struct brigade_deleter
-      {
-        void operator() (apr_bucket_brigade* p) const
-        {
-          if (p != nullptr)
-          {
-            apr_status_t r (apr_brigade_destroy (p));
-
-            // Shouldn't fail unless something is severely damaged.
-            //
-            assert (r == APR_SUCCESS);
-          }
-        }
-      };
-
-      unique_ptr<apr_bucket_brigade, brigade_deleter> buckets_;
-    };
-
-    class istream_buckets_base
-    {
-    public:
-      explicit
-      istream_buckets_base (const apr_bucket_brigade* bs): buf_ (bs) {}
-
-    protected:
-      istreambuf_buckets buf_;
-    };
-
-    class istream_buckets: public istream_buckets_base, public istream
-    {
-    public:
-      explicit
-      istream_buckets (const apr_bucket_brigade* bs)
-          // Note that calling dtor for istream object before init() is called
-          // is undefined behavior. That's the reason for inventing the
-          // istream_buckets_base class.
-          //
-          : istream_buckets_base (bs), istream (&buf_)
-      {
-        exceptions (failbit | badbit);
-      }
-
-      void
-      rewind ()
-      {
-        buf_.rewind ();
-        clear ();       // Clears *bit flags (in particular eofbit).
-      }
-    };
-
-    // request
-    //
-    request::
-    request (request_rec* rec) noexcept
-      : rec_ (rec)
-    {
-      rec_->status = HTTP_OK;
-    }
-
-    request::
-    ~request ()
-    {
-    }
-
-    void request::
-    state (request_state s)
-    {
-      assert (s != request_state::initial);
-
-      if (s == state_)
-        return; // Noop.
-
-      if (s < state_)
-      {
-        // Can't "unwind" irrevocable interaction with Apache API.
-        //
-        static const char* names[] = {
-          "initial", "reading", "headers", "writing"};
-
-        string str ("web::apache::request::set_state: ");
-        str += names[static_cast<size_t> (state_)];
-        str += " to ";
-        str += names[static_cast<size_t> (s)];
-
-        throw sequence_error (move (str));
-      }
-
-      if (s == request_state::reading)
-      {
-        // Prepare request content for reading.
-        //
-        int r (ap_setup_client_block (rec_, REQUEST_CHUNKED_DECHUNK));
-
-        if (r != OK)
-          throw invalid_request (r);
-      }
-      else if (s > request_state::reading && state_ <= request_state::reading)
-      {
-        // Read request content if any, discard whatever is received.
-        //
-        int r (ap_discard_request_body (rec_));
-
-        if (r != OK)
-          throw invalid_request (r);
-      }
-
-      state_ = s;
-    }
-
-    void request::
-    rewind ()
-    {
-      // @@ Response cookies buffering is not supported yet. When done will be
-      //    possible to rewind in broader range of cases.
-      //
-      if (state_ > request_state::reading)
-        throw sequence_error ("web::apache::request::rewind: unbuffered");
-
-      out_.reset ();
-      out_buf_.reset ();
-
-      rec_->status = HTTP_OK;
-
-      ap_set_content_type (rec_, nullptr); // Unset the output content type.
-
-      // We don't need to rewind the input stream (which well may fail if
-      // unbuffered) if the form data is already read.
-      //
-      if (in_ != nullptr && form_data_ == nullptr)
-      {
-        assert (in_buf_ != nullptr);
-
-        in_buf_->rewind (); // Throws if impossible to rewind.
-        in_->clear ();      // Clears *bit flags (in particular eofbit).
-      }
-
-      // Rewind uploaded file streams.
-      //
-      if (uploads_ != nullptr)
-      {
-        for (const unique_ptr<istream_buckets>& is: *uploads_)
-        {
-          if (is != nullptr)
-            is->rewind ();
-        }
-      }
-    }
-
-    istream& request::
-    content (size_t limit, size_t buffer)
-    {
-      // Create the input stream/streambuf if not present, otherwise adjust the
-      // limits.
-      //
-      if (in_ == nullptr)
-      {
-        unique_ptr<istreambuf_cache> in_buf (
-          new istreambuf_cache (limit, buffer, rec_, *this));
-
-        in_.reset (new istream (in_buf.get ()));
-        in_buf_ = move (in_buf);
-        in_->exceptions (istream::failbit | istream::badbit);
-      }
-      else
-      {
-        assert (in_buf_ != nullptr);
-        in_buf_->limits (limit, buffer);
-      }
-
-      return *in_;
-    }
-
-    const path& request::
-    path ()
-    {
-      if (path_.empty ())
-      {
-        path_ = path_type (rec_->uri); // Is already URL-decoded.
-
-        // Module request handler can not be called if URI is empty.
-        //
-        assert (!path_.empty ());
-      }
-
-      return path_;
-    }
-
-    const name_values& request::
-    parameters (size_t limit, bool url_only)
-    {
-      if (parameters_ == nullptr || url_only < url_only_parameters_)
-      {
-        try
-        {
-          if (parameters_ == nullptr)
-          {
-            parameters_.reset (new name_values ());
-            parse_url_parameters (rec_->args);
-          }
-
-          if (!url_only && form_data (limit))
-          {
-            // After the form data is parsed we can clean it up for the
-            // application/x-www-form-urlencoded encoding but not for the
-            // multipart/form-data (see parse_multipart_parameters() for
-            // details).
-            //
-            if (form_multipart_)
-              parse_multipart_parameters (*form_data_);
-            else
-            {
-              // Make the character vector a NULL-terminated string.
-              //
-              form_data_->push_back ('\0');
-
-              parse_url_parameters (form_data_->data ());
-              *form_data_ = vector<char> (); // Reset the cache.
-            }
-          }
-        }
-        catch (const invalid_argument&)
-        {
-          throw invalid_request ();
-        }
-
-        url_only_parameters_ = url_only;
-      }
-
-      return *parameters_;
-    }
-
-    bool request::
-    form_data (size_t limit)
-    {
-      if (form_data_ == nullptr)
-      {
-        form_data_.reset (new vector<char> ());
-
-        // We will not consider POST body as a form data if the request is in
-        // the reading or later state.
-        //
-        if (rec_->method_number == M_POST && state_ < request_state::reading)
-        {
-          const char* ct (apr_table_get (rec_->headers_in, "Content-Type"));
-
-          if (ct != nullptr)
-          {
-            form_multipart_ = icasecmp ("multipart/form-data", ct, 19) == 0;
-
-            if (form_multipart_ ||
-                icasecmp ("application/x-www-form-urlencoded", ct, 33) == 0)
-              *form_data_ = vector<char> (
-                istreambuf_iterator<char> (content (limit)),
-                istreambuf_iterator<char> ());
-          }
-        }
-      }
-
-      return !form_data_->empty ();
-    }
-
-    void request::
-    parse_url_parameters (const char* args)
-    {
-      assert (parameters_ != nullptr);
-
-      for (auto n (args); n != nullptr; )
-      {
-        const char* v (strchr (n, '='));
-        const char* e (strchr (n, '&'));
-
-        if (e != nullptr && e < v)
-          v = nullptr;
-
-        string name (v != nullptr
-                     ? mime_url_decode (n, v) :
-                     (e
-                      ? mime_url_decode (n, e)
-                      : mime_url_decode (n, n + strlen (n))));
-
-        optional<string> value;
-
-        if (v++)
-          value = e
-            ? mime_url_decode (v, e)
-            : mime_url_decode (v, v + strlen (v));
-
-        if (!name.empty () || value)
-          parameters_->emplace_back (move (name), move (value));
-
-        n = e ? e + 1 : nullptr;
-      }
-    }
-
-    void request::
-    parse_multipart_parameters (const vector<char>& body)
-    {
-      assert (parameters_ != nullptr && uploads_ == nullptr);
-
-      auto throw_bad_request = [] (apr_status_t s,
-                                   status_code sc = HTTP_BAD_REQUEST)
-      {
-        char buf[1024];
-        throw invalid_request (sc, apr_strerror (s, buf, sizeof (buf)));
-      };
-
-      // Create the file upload stream list, filling it with NULLs for the
-      // parameters parsed from the URL query part.
-      //
-      uploads_.reset (
-        new vector<unique_ptr<istream_buckets>> (parameters_->size ()));
-
-      // All the required objects (parser, input/output buckets, etc.) will be
-      // allocated in the request memory pool and so will have the HTTP
-      // request duration lifetime.
-      //
-      apr_pool_t* pool (rec_->pool);
-
-      // Create the input bucket brigade containing a single bucket that
-      // references the form data.
-      //
-      apr_bucket_alloc_t* ba (apr_bucket_alloc_create (pool));
-      if (ba == nullptr)
-        throw_internal_error (APR_ENOMEM, "apr_bucket_alloc_create");
-
-      apr_bucket_brigade* bb (apr_brigade_create (pool, ba));
-      if (bb == nullptr)
-        throw_internal_error (APR_ENOMEM, "apr_brigade_create");
-
-      apr_bucket* b (
-        apr_bucket_immortal_create (body.data (), body.size (), ba));
-
-      if (b == nullptr)
-        throw_internal_error (APR_ENOMEM, "apr_bucket_immortal_create");
-
-      APR_BRIGADE_INSERT_TAIL (bb, b);
-
-      if ((b = apr_bucket_eos_create (ba)) == nullptr)
-        throw_internal_error (APR_ENOMEM, "apr_bucket_eos_create");
-
-      APR_BRIGADE_INSERT_TAIL (bb, b);
-
-      // Make sure that the parser will not swap the parsed data to disk
-      // passing the maximum possible value for the brigade limit. This way
-      // the resulting buckets will reference the form data directly, making
-      // no copies. This why we should not reset the form data cache after
-      // the parsing.
-      //
-      // Note that in future we may possibly setup the parser to read from the
-      // Apache internals directly and enable swapping the data to disk to
-      // minimize memory consumption.
-      //
-      apreq_parser_t* parser (
-        apreq_parser_make (pool,
-                           ba,
-                           apr_table_get (rec_->headers_in, "Content-Type"),
-                           apreq_parse_multipart,
-                           APR_SIZE_MAX /* brigade_limit */,
-                           nullptr /* temp_dir */,
-                           nullptr /* hook */,
-                           nullptr /* ctx */));
-
-      if (parser == nullptr)
-        throw_internal_error (APR_ENOMEM, "apreq_parser_make");
-
-      // Create the output table that will be filled with the parsed
-      // parameters.
-      //
-      apr_table_t* params (apr_table_make (pool, APREQ_DEFAULT_NELTS));
-      if (params == nullptr)
-        throw_internal_error (APR_ENOMEM, "apr_table_make");
-
-      // Parse the form data.
-      //
-      apr_status_t r (apreq_parser_run (parser, params, bb));
-      if (r != APR_SUCCESS)
-        throw_bad_request (r);
-
-      // Fill the parameter and file upload stream lists.
-      //
-      const apr_array_header_t* ps (apr_table_elts (params));
-      size_t n (ps->nelts);
-
-      for (auto p (reinterpret_cast<const apr_table_entry_t*> (ps->elts));
-           n--; ++p)
-      {
-        assert (p->key != nullptr && p->val != nullptr);
-
-        if (*p->key != '\0')
-        {
-          parameters_->emplace_back (p->key, optional<string> (p->val));
-
-          const apreq_param_t* ap (apreq_value_to_param (p->val));
-          assert (ap != nullptr); // Must always be resolvable.
-
-          uploads_->emplace_back (ap->upload != nullptr
-                                  ? new istream_buckets (ap->upload)
-                                  : nullptr);
-        }
-      }
-    }
-
-    request::uploads_type& request::
-    uploads () const
-    {
-      if (parameters_ == nullptr || url_only_parameters_)
-        sequence_error ("web::apache::request::uploads");
-
-      if (uploads_ == nullptr)
-        throw invalid_argument ("no uploads");
-
-      assert (uploads_->size () == parameters_->size ());
-      return *uploads_;
-    }
-
-    istream& request::
-    open_upload (size_t index)
-    {
-      uploads_type& us (uploads ());
-      size_t n (us.size ());
-
-      if (index >= n)
-        throw invalid_argument ("invalid index");
-
-      const unique_ptr<istream_buckets>& is (us[index]);
-
-      if (is == nullptr)
-        throw invalid_argument ("no upload");
-
-      return *is;
-    }
-
-    istream& request::
-    open_upload (const string& name)
-    {
-      uploads_type& us (uploads ());
-      size_t n (us.size ());
-
-      istream* r (nullptr);
-      for (size_t i (0); i < n; ++i)
-      {
-        if ((*parameters_)[i].name == name)
-        {
-          istream* is (us[i].get ());
-
-          if (is != nullptr)
-          {
-            if (r != nullptr)
-              throw invalid_argument ("multiple uploads for '" + name + "'");
-
-            r = is;
-          }
-        }
-      }
-
-      if (r == nullptr)
-        throw invalid_argument ("no upload");
-
-      return *r;
-    }
-
-    const name_values& request::
-    headers ()
-    {
-      if (headers_ == nullptr)
-      {
-        headers_.reset (new name_values ());
-
-        const apr_array_header_t* ha (apr_table_elts (rec_->headers_in));
-        size_t n (ha->nelts);
-
-        headers_->reserve (n + 1); // One for the custom :Client-IP header.
-
-        auto add = [this] (const char* n, const char* v)
-        {
-          assert (n != nullptr && v != nullptr);
-          headers_->emplace_back (n, optional<string> (v));
-        };
-
-        for (auto h (reinterpret_cast<const apr_table_entry_t*> (ha->elts));
-             n--; ++h)
-          add (h->key, h->val);
-
-        assert (rec_->connection != nullptr);
-
-        add (":Client-IP", rec_->connection->client_ip);
-      }
-
-      return *headers_;
-    }
-
-    const name_values& request::
-    cookies ()
-    {
-      if (cookies_ == nullptr)
-      {
-        cookies_.reset (new name_values ());
-
-        const apr_array_header_t* ha (apr_table_elts (rec_->headers_in));
-        size_t n (ha->nelts);
-
-        for (auto h (reinterpret_cast<const apr_table_entry_t*> (ha->elts));
-             n--; ++h)
-        {
-          assert (h->key != nullptr);
-
-          if (icasecmp (h->key, "Cookie") == 0)
-          {
-            for (const char* n (h->val); n != nullptr; )
-            {
-              const char* v (strchr (n, '='));
-              const char* e (strchr (n, ';'));
-
-              if (e != nullptr && e < v)
-                v = nullptr;
-
-              string name (v != nullptr
-                           ? mime_url_decode (n, v, true)
-                           : (e
-                              ? mime_url_decode (n, e, true)
-                              : mime_url_decode (n, n + strlen (n), true)));
-
-              optional<string> value;
-
-              if (v++)
-                value = e
-                  ? mime_url_decode (v, e, true)
-                  : mime_url_decode (v, v + strlen (v), true);
-
-              if (!name.empty () || value)
-                cookies_->emplace_back (move (name), move (value));
-
-              n = e ? e + 1 : nullptr;
-            }
-          }
-        }
-      }
-
-      return *cookies_;
-    }
-
-    ostream& request::
-    content (status_code status, const string& type, bool buffer)
-    {
-      if (out_ &&
-
-          // Same status code.
-          //
-          status == rec_->status &&
-
-          // Same buffering flag.
-          //
-          buffer ==
-          (dynamic_cast<stringbuf*> (out_buf_.get ()) != nullptr) &&
-
-          // Same content type.
-          //
-          icasecmp (type, rec_->content_type ? rec_->content_type : "") == 0)
-      {
-        // No change, return the existing stream.
-        //
-        return *out_;
-      }
-
-      if (state_ >= request_state::writing)
-        throw sequence_error ("web::apache::request::content");
-
-      if (!buffer)
-        // Request body will be discarded prior first byte of content is
-        // written. Save form data now to make it available for future
-        // parameters() call.
-        //
-        // In the rare cases when the form data is expectedly bigger than 64K
-        // the client can always call parameters(limit) explicitly.
-        //
-        form_data (64 * 1024);
-
-      unique_ptr<streambuf> out_buf (
-        buffer
-        ? static_cast<streambuf*> (new stringbuf ())
-        : static_cast<streambuf*> (new ostreambuf (rec_, *this)));
-
-      out_.reset (new ostream (out_buf.get ()));
-      out_buf_ = move (out_buf);
-      out_->exceptions (ostream::eofbit | ostream::failbit | ostream::badbit);
-
-      rec_->status = status;
-
-      ap_set_content_type (
-        rec_,
-        type.empty () ? nullptr : apr_pstrdup (rec_->pool, type.c_str ()));
-
-      return *out_;
-    }
-
-    void request::
-    status (status_code status)
-    {
-      if (status != rec_->status)
-      {
-        // Setting status code in exception handler is a common usecase
-        // where no sense to throw but still need to signal apache a
-        // proper status code.
-        //
-        if (state_ >= request_state::writing && !current_exception ())
-          throw sequence_error ("web::apache::request::status");
-
-        rec_->status = status;
-        out_.reset ();
-        out_buf_.reset ();
-        ap_set_content_type (rec_, nullptr);
-      }
-    }
-
-    void request::
-    cookie (const char* name,
-            const char* value,
-            const chrono::seconds* max_age,
-            const char* path,
-            const char* domain,
-            bool secure,
-            bool buffer)
-    {
-      assert (!buffer); // Cookie buffering is not implemented yet.
-
-      string s (mime_url_encode (name));
-      s += "=";
-      s += mime_url_encode (value);
-
-      if (max_age)
-      {
-        timestamp tp (system_clock::now () + *max_age);
-        time_t t (system_clock::to_time_t (tp));
-
-        // Assume global locale is not changed and still "C".
-        //
-        char b[100];
-        strftime (b, sizeof (b), "%a, %d-%b-%Y %H:%M:%S GMT", gmtime (&t));
-        s += "; Expires=";
-        s += b;
-      }
-
-      if (path)
-      {
-        s += ";Path=";
-        s += path;
-      }
-
-      if (domain)
-      {
-        s += ";Domain=";
-        s += domain;
-      }
-
-      if (secure)
-        s += ";Secure";
-
-      state (request_state::headers);
-      apr_table_add (rec_->err_headers_out, "Set-Cookie", s.c_str ());
-    }
-  }
-}