Move inflate functions to libspdylay from examples.

examples/.gitignore

@@ -1,3 +1,4 @@
 spdycat
 spdyd
 spdynative
+spdycli

examples/spdycat.cc

@@ -76,56 +76,13 @@ struct Request {
   Request(const uri::UriStruct& us):us(us), inflater(0) {}
   ~Request()
   {
-    if(inflater) {
-      inflateEnd(inflater);
-      delete inflater;
-    }
+    spdylay_free_inflate_stream(inflater);
   }
 
   void init_inflater()
   {
-    inflater = new z_stream();
-    inflater->next_in = Z_NULL;
-    inflater->zalloc = Z_NULL;
-    inflater->zfree = Z_NULL;
-    inflater->opaque = Z_NULL;
-    int rv = inflateInit2(inflater, 47);
-    assert(rv == Z_OK);
-  }
-
-  // Inflates data in |in| with the length |*inlen_ptr| and stores the
-  // inflated data to |out| which has allocated size at least
-  // |*outlen_ptr|. On return, |*outlen_ptr| is updated to represent
-  // the number of data written in |out|.  Similarly, |*inlen_ptr| is
-  // updated to represent the number of input bytes processed.
-  //
-  // This function returns 0 if it succeeds, or -1.
-  int inflate_data(uint8_t *out, size_t *outlen_ptr,
-                   const uint8_t *in, size_t *inlen_ptr)
-  {
-    assert(inflater);
-    inflater->avail_in = *inlen_ptr;
-    inflater->next_in = const_cast<unsigned char*>(in);
-    inflater->avail_out = *outlen_ptr;
-    inflater->next_out = out;
-
-    int rv = inflate(inflater, Z_NO_FLUSH);
-
-    *inlen_ptr -= inflater->avail_in;
-    *outlen_ptr -= inflater->avail_out;
-    switch(rv) {
-    case Z_OK:
-    case Z_STREAM_END:
-    case Z_BUF_ERROR:
-      return 0;
-    case Z_DATA_ERROR:
-    case Z_STREAM_ERROR:
-    case Z_NEED_DICT:
-    case Z_MEM_ERROR:
-      return -1;
-    default:
-      assert(0);
-    }
+    inflater = spdylay_new_inflate_stream();
+    assert(inflater != NULL);
   }
 };
 
@@ -148,7 +105,7 @@ void on_data_chunk_recv_callback
         uint8_t out[MAX_OUTLEN];
         size_t outlen = MAX_OUTLEN;
         size_t tlen = len;
-        int rv = req->inflate_data(out, &outlen, data, &tlen);
+        int rv = spdylay_inflate_data(req->inflater, out, &outlen, data, &tlen);
         if(rv == -1) {
           spdylay_submit_rst_stream(session, stream_id, SPDYLAY_INTERNAL_ERROR);
           break;

examples/spdycli.c

@@ -132,20 +132,6 @@ static void diec(const char *func, int error_code)
   exit(EXIT_FAILURE);
 }
 
-static void request_inflater_init(struct Request *req)
-{
-  int rv;
-  req->inflater = malloc(sizeof(z_stream));
-  req->inflater->next_in = Z_NULL;
-  req->inflater->zalloc = Z_NULL;
-  req->inflater->zfree = Z_NULL;
-  req->inflater->opaque = Z_NULL;
-  rv = inflateInit2(req->inflater, 47);
-  if(rv != Z_OK) {
-    diec("inflateInit2", rv);
-  }
-}
-
 /*
  * Check response is content-encoding: gzip. We need this because SPDY
  * client is required to support gzip.
@@ -164,7 +150,10 @@ static void check_gzip(struct Request *req, char **nv)
     if(req->inflater) {
       return;
     }
-    request_inflater_init(req);
+    req->inflater = spdylay_new_inflate_stream();
+    if (req->inflater == NULL) {
+      die("Can't allocate inflate stream.");
+    }
   }
 }
 
@@ -329,36 +318,6 @@ static void on_stream_close_callback(spdylay_session *session,
   }
 }
 
-static int request_inflate_data(struct Request *req,
-                                uint8_t *out, size_t *outlen_ptr,
-                                const uint8_t *in, size_t *inlen_ptr)
-{
-  int rv;
-  assert(req->inflater);
-  req->inflater->avail_in = *inlen_ptr;
-  req->inflater->next_in = (unsigned char*)in;
-  req->inflater->avail_out = *outlen_ptr;
-  req->inflater->next_out = out;
-
-  rv = inflate(req->inflater, Z_NO_FLUSH);
-
-  *inlen_ptr -= req->inflater->avail_in;
-  *outlen_ptr -= req->inflater->avail_out;
-  switch(rv) {
-  case Z_OK:
-  case Z_STREAM_END:
-  case Z_BUF_ERROR:
-    return 0;
-  case Z_DATA_ERROR:
-  case Z_STREAM_ERROR:
-  case Z_NEED_DICT:
-  case Z_MEM_ERROR:
-    return -1;
-  default:
-    assert(0);
-  }
-}
-
 #define MAX_OUTLEN 4096
 
 /*
@@ -381,7 +340,7 @@ static void on_data_chunk_recv_callback(spdylay_session *session, uint8_t flags,
         size_t outlen = MAX_OUTLEN;
         size_t tlen = len;
         int rv;
-        rv = request_inflate_data(req, out, &outlen, data, &tlen);
+        rv = spdylay_inflate_data(req->inflater, out, &outlen, data, &tlen);
         if(rv == -1) {
           spdylay_submit_rst_stream(session, stream_id, SPDYLAY_INTERNAL_ERROR);
           break;
@@ -602,10 +561,7 @@ static void request_free(struct Request *req)
   free(req->host);
   free(req->path);
   free(req->hostport);
-  if(req->inflater) {
-    inflateEnd(req->inflater);
-    free(req->inflater);
-  }
+  spdylay_free_inflate_stream(req->inflater);
 }
 
 /*

lib/Makefile.am

@@ -35,12 +35,12 @@ OBJECTS = spdylay_pq.c spdylay_map.c spdylay_queue.c \
 	spdylay_buffer.c spdylay_frame.c spdylay_zlib.c \
 	spdylay_session.c spdylay_helper.c spdylay_stream.c spdylay_npn.c \
 	spdylay_submit.c spdylay_outbound_item.c \
-	spdylay_client_cert_vector.c
+	spdylay_client_cert_vector.c spdylay_gzip.c
 
 HFILES = spdylay_pq.h spdylay_int.h spdylay_map.h spdylay_queue.h \
 	spdylay_buffer.h spdylay_frame.h spdylay_zlib.h \
 	spdylay_session.h spdylay_helper.h spdylay_stream.h spdylay_int.h \
-	spdylay_npn.h \
+	spdylay_npn.h spdylay_gzip.h \
 	spdylay_submit.h spdylay_outbound_item.h \
 	spdylay_client_cert_vector.h \
 	spdylay_net.h

lib/includes/spdylay/spdylay.h

@@ -32,6 +32,7 @@ extern "C" {
 #include <stdlib.h>
 #include <stdint.h>
 #include <sys/types.h>
+#include <zlib.h>
 
 #include <spdylay/spdylayver.h>
 
@@ -1827,6 +1828,51 @@ int spdylay_select_next_protocol(unsigned char **out, unsigned char *outlen,
  */
 uint16_t spdylay_npn_get_version(const unsigned char *proto, size_t protolen);
 
+/**
+ * @function
+ *
+ * A helper function to set up a per request zlib stream to inflate data.
+ */
+z_stream *spdylay_new_inflate_stream();
+
+/**
+ * @function
+ * Inflates data from in to out.  Returns 0 on success and -1 on error.
+ * E.g
+ * void on_data_chunk_recv_callback(spdylay_session *session, uint8_t flags,
+ *                                 int32_t stream_id,
+ *                                 const uint8_t *data, size_t len,
+ *                                 void *user_data)
+ *  req = spdylay_session_get_stream_user_data(session, stream_id);
+ *  z_stream *inflater = req->inflater;
+ *  while(len > 0) {
+ *    uint8_t out[MAX_OUTLEN];
+ *    size_t outlen = MAX_OUTLEN;
+ *    size_t tlen = len;
+ *    int rv;
+ *    rv = spdylay_inflate_data(inflater, out, &outlen, data, &tlen);
+ *    if(rv == -1) {
+ *      spdylay_submit_rst_stream(session, stream_id, SPDYLAY_INTERNAL_ERROR);
+ *      break;
+ *    }
+ *    ... Do stuff ...
+ *    data += tlen;
+ *    len -= tlen;
+ *  }
+ *  ....
+ * }
+ */
+int spdylay_inflate_data
+(z_stream *stream, uint8_t *out, size_t *outlen_ptr,
+ const uint8_t *in, size_t *inlen_ptr);
+
+/**
+ * @function
+ * Frees the inflate stream.  inflater may be null.
+ */
+void spdylay_free_inflate_stream(z_stream* inflater);
+
+
 #ifdef __cplusplus
 }
 #endif

lib/spdylay_gzip.c

@@ -0,0 +1,87 @@
+/*
+ * Spdylay - SPDY Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <zlib.h>
+#include "spdylay_gzip.h"
+
+z_stream *spdylay_new_inflate_stream()
+{
+  int rv;
+  z_stream *inflater = malloc(sizeof(z_stream));
+  if (inflater == NULL) {
+    return NULL;
+  }
+
+  inflater->next_in = Z_NULL;
+  inflater->zalloc = Z_NULL;
+  inflater->zfree = Z_NULL;
+  inflater->opaque = Z_NULL;
+  rv = inflateInit2(inflater, 47);
+  if(rv != Z_OK) {
+    free(inflater);
+    return NULL;
+  }
+  return inflater;
+}
+
+
+int spdylay_inflate_data
+(z_stream *inflater, uint8_t *out, size_t *outlen_ptr,
+ const uint8_t *in, size_t *inlen_ptr) {
+  int rv;
+  assert(inflater);
+  inflater->avail_in = *inlen_ptr;
+  inflater->next_in = (unsigned char*)in;
+  inflater->avail_out = *outlen_ptr;
+  inflater->next_out = out;
+
+  rv = inflate(inflater, Z_NO_FLUSH);
+
+  *inlen_ptr -= inflater->avail_in;
+  *outlen_ptr -= inflater->avail_out;
+  switch(rv) {
+  case Z_OK:
+  case Z_STREAM_END:
+  case Z_BUF_ERROR:
+    return 0;
+  case Z_DATA_ERROR:
+  case Z_STREAM_ERROR:
+  case Z_NEED_DICT:
+  case Z_MEM_ERROR:
+    return -1;
+  default:
+    abort();
+  }
+}
+
+void spdylay_free_inflate_stream(z_stream* stream)
+{
+  if (stream != NULL) {
+    inflateEnd(stream);
+    free(stream);
+  }
+}

lib/spdylay_gzip.h

@@ -0,0 +1,34 @@
+/*
+ * Spdylay - SPDY Library
+ *
+ * Copyright (c) 2012 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdint.h>
+#include <zlib.h>
+
+/* See usage comments in spdylay.h */
+z_stream *spdylay_new_inflate_stream();
+int spdylay_inflate_data
+(z_stream *stream, uint8_t *out, size_t *outlen_ptr,
+ const uint8_t *in, size_t *inlen_ptr);
+void spdylay_free_inflate_stream(z_stream* stream);