Implement FastCGI, initial version

1 files changed, 59 insertions, 0 deletions

diff --git a/src/libtipidee/tipidee_fcgi_read.c b/src/libtipidee/tipidee_fcgi_read.c
new file mode 100644
index 0000000..9b6dcb0
--- /dev/null
+++ b/src/libtipidee/tipidee_fcgi_read.c
@@ -0,0 +1,59 @@
+/* ISC license. */
+
+#include <stdint.h>
+#include <errno.h>
+
+#include <skalibs/uint16.h>
+#include <skalibs/uint32.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/unix-timed.h>
+
+#include <tipidee/fcgi.h>
+
+#include <skalibs/posixishard.h>
+
+int tipidee_fcgi_read (tipidee_fcgi *fc, uint32_t *status, stralloc *sa, tain *stamp)
+{
+  int stream ;
+  uint16_t u ;
+  char hdr[8] ;
+  if (buffer_timed_get(&fc->b, hdr, 8, &fc->deadline, stamp) < 8) return -1 ;
+  if (hdr[0] != 1) return (errno = EPROTO, -1) ;
+  uint16_unpack_big(hdr + 2, &u) ;
+  if (u != fc->id) return (errno = EPROTO, -1) ;
+  uint16_unpack_big(hdr + 4, &u) ;
+  switch (hdr[1])
+  {
+    case FCGI_STDOUT : stream = 1 ;
+    case FCGI_STDERR : stream = 2 ;
+    case FCGI_END_REQUEST : stream = 0 ;
+    default : return (errno = EPROTO, -1) ;
+  }
+  if (stream)
+  {
+    if (!stralloc_readyplus(sa, u)) return -1 ;
+    if (buffer_timed_get(&fc->b, sa->s + sa->len, u, &fc->deadline, stamp) < u) return -1 ;
+    sa->len += u ;
+  }
+  else
+  {
+    char endreq[8] ;
+    if (u != 8) return (errno = EPROTO, -1) ;
+    if (buffer_timed_get(&fc->b, endreq, 8, &fc->deadline, stamp) < 8) return -1 ;
+    switch (endreq[4])
+    {
+      case FCGI_REQUEST_COMPLETE : break ;
+      case FCGI_CANT_MPX_CONN : return (errno = ECONNREFUSED, -1) ;
+      case FCGI_OVERLOADED : return (errno = ENFILE, -1) ;
+      case FCGI_UNKNOWN_ROLE : return (errno = EAFNOSUPPORT, -1) ;
+      default : return (errno = EPROTO, 1) ;
+    }
+    uint32_unpack_big(endreq, status) ;
+  }
+  if (hdr[6])
+  {
+    char tmp[(uint8_t)hdr[6]] ;
+    if (buffer_timed_get(&fc->b, tmp, (uint8_t)hdr[6], &fc->deadline, stamp)) return -1 ;
+  }
+  return stream ;
+}