/**
* @return
* -1 if a header was invalid (see http status for details).
* 0 if the end-of-headers was reached.
* 1 if a header was successfully parsed.
*/
int
http_parse_header(http_t *ctx, char *buf, size_t buf_size,
char **name_ptr, char **value_ptr)
{
char *value;
RUNTIME_ASSERT(ctx);
RUNTIME_ASSERT(HTTP_STATE_HEADERS == ctx->state);
if (name_ptr)
*name_ptr = NULL;
if (value_ptr)
*value_ptr = NULL;
switch (http_read_header(ctx, buf, buf_size)) {
case -1:
DBUG("http_read_header() failed: %u \"%s\"",
ctx->status_code, ctx->status_msg);
return -1;
case 0:
ctx->state = HTTP_STATE_BODY;
return 0;
case 1:
break;
default:
RUNTIME_ASSERT(0);
http_set_status(ctx, 500, "Internal Server Error");
return -1;
}
value = http_parse_header_name(buf);
if (!value) {
http_set_status(ctx, 400, "Bad Request (Bad Header)");
return -1;
}
if (name_ptr)
*name_ptr = buf;
if (value_ptr)
*value_ptr = skip_spaces(value);
return 1;
}
void
rest_set_response_status(RESPONSE* response, status_code_t status)
{
#ifdef WITH_COAP
coap_set_code(response, status);
#else /*WITH_COAP*/
http_set_status(response, status);
#endif /*WITH_COAP*/
}
static int
http_handle_host_header(http_t *ctx, const char *name, char *value)
{
char *ep;
RUNTIME_ASSERT(ctx);
RUNTIME_ASSERT(name);
RUNTIME_ASSERT(value);
if ('\0' != value[0]) {
ep = http_parse_host(value);
if (!ep) {
goto bad_host;
}
} else {
ep = value;
}
if (':' != *ep) {
ctx->port = 0;
} else {
ep++;
if (!parse_port_number(ep, &ctx->port, &ep)) {
http_set_status(ctx, 400, "Bad Request (Bad Port)");
return -1;
}
}
ep = skip_spaces(ep);
if ('\0' != *ep) {
goto bad_host;
}
http_set_host(ctx, value);
return 0;
bad_host:
http_set_status(ctx, 400, "Bad Request (Bad Host)");
return -1;
}
static int
http_handle_transfer_encoding_header(http_t *ctx,
const char *name, char *value)
{
RUNTIME_ASSERT(ctx);
RUNTIME_ASSERT(name);
RUNTIME_ASSERT(value);
if (0 == strcasecmp(value, "chunked")) {
ctx->encoding = HTTP_TRANSFER_ENCODING_CHUNKED;
return 0;
}
http_set_status(ctx, 400, "Bad Request (Bad Transfer-Encoding)");
return -1;
}
/**
* @return
* -1 if a header was invalid (see http status for details)
* 0 if all headers are successfully handled (end-of-header reached)
*/
int
http_process_headers(http_t *ctx, char *buf, size_t buf_size)
{
RUNTIME_ASSERT(ctx);
RUNTIME_ASSERT(HTTP_STATE_HEADERS == ctx->state);
for (;;) {
char *name, *value;
name = value = NULL;
switch (http_parse_header(ctx, buf, buf_size, &name, &value)) {
case -1:
DBUG("http_parse_header() failed: %u \"%s\"",
ctx->status_code, ctx->status_msg);
return -1;
case 0:
RUNTIME_ASSERT(HTTP_STATE_BODY == ctx->state);
return 0;
case 1:
break;
default:
RUNTIME_ASSERT(0);
http_set_status(ctx, 500, "Internal Server Error");
return -1;
}
RUNTIME_ASSERT(HTTP_STATE_HEADERS == ctx->state);
RUNTIME_ASSERT(name);
RUNTIME_ASSERT(value);
#if 0
http_log(ctx, "name=\"%s\"; value=\"%s\"", name, value);
#endif
if (0 != http_handle_header(ctx, name, value))
break;
}
return -1;
}
static int
http_handle_content_length_header(http_t *ctx, const char *name, char *value)
{
uint64_t u;
int error;
char *ep;
RUNTIME_ASSERT(ctx);
RUNTIME_ASSERT(name);
RUNTIME_ASSERT(value);
u = parse_uint64(value, &ep, 10, &error);
if (error || '\0' != *ep) {
http_set_status(ctx, 400, "Bad Request (Bad Content-Length)");
return -1;
}
ctx->content_length = u;
return 0;
}
/**
* Reads a single HTTP header line from ctx->input and parses it.
* Header continuation is handled transparently. Trailing space characters
* are discarded from the header line and the line is NUL-terminated.
*
* @param ctx an initialized ``http_t'' in state HTTP_STATE_HEADERS.
* @param buf a work buffer.
* @param buf_size the size of buf; this defines the maximum length of
* headers that can be handled.
*
* @return
* -1 if a header was invalid (see http status for details).
* 0 if the end-of-headers was reached.
* 1 if a header was successfully parsed.
*/
int
http_read_header(http_t *ctx, char *buf, size_t buf_size)
{
char *p;
size_t size;
RUNTIME_ASSERT(ctx);
RUNTIME_ASSERT(buf);
RUNTIME_ASSERT(buf_size > 0);
RUNTIME_ASSERT(ctx->state == HTTP_STATE_HEADERS);
p = buf;
size = buf_size;
for (;;) {
ssize_t r;
r = fifo_findchar(ctx->input, '\n', size);
if ((ssize_t) -1 == r) {
if ((size_t) fifo_fill(ctx->input) > size)
DBUG("Header line is too long");
else
DBUG("Header line is not yet terminated");
ctx->keep_alive = false;
http_set_status(ctx, 413, "Request Entity Too Large");
return -1;
}
RUNTIME_ASSERT(r >= 0 && (size_t) r < size);
/* Make sure the headers don't contain any NUL characters */
if ((ssize_t) -1 != fifo_findchar(ctx->input, '\0', r)) {
ctx->keep_alive = false;
http_set_status(ctx, 400, "Bad Request (NUL in Header)");
return -1;
}
fifo_read(ctx->input, p, 1 + r);
RUNTIME_ASSERT('\n' == p[r]);
/* Discard trailing '\r' characters */
for (/* NOTHING*/; r > 0; r--) {
if ('\r' != p[r - 1])
break;
}
RUNTIME_ASSERT('\n' == p[r] || '\r' == p[r]);
p[r] = '\0';
/* Check for a header continuation with HT (0x09) or a space (0x20) */
if (
0 != fifo_findchar(ctx->input, 0x09, 1) &&
0 != fifo_findchar(ctx->input, 0x20, 1)
) {
/* Discard all trailing spaces */
if (isspace((unsigned char) p[r])) {
while (r > 0 && isspace((unsigned char) p[r - 1]))
r--;
p[r] = '\0';
}
break;
}
p += r;
size -= r;
/* Discard all consecutive HT and SP characters */
fifo_skip_chars(ctx->input, fifo_fill(ctx->input), "\x09\x20");
/* Replace all skipped space by a single space character */
if (size > 0) {
*p++ = 0x20;
size--;
}
}
if (ctx->debug_dump_headers) {
http_log(ctx, "\t%s", buf);
}
if ('\0' == *buf) {
ctx->state = HTTP_STATE_BODY;
return 0;
}
return 1;
}
/* This function is just a compliant action wrapper for "set-status". */
static enum act_return action_http_set_status(struct act_rule *rule, struct proxy *px,
struct session *sess, struct stream *s, int flags)
{
http_set_status(rule->arg.status.code, rule->arg.status.reason, s);
return ACT_RET_CONT;
}
static
PT_THREAD(handle_request(connection_state_t* conn_state))
{
static int error;
const char* content_len;
PSOCK_BEGIN(&(conn_state->sin));
content_len = NULL;
error = HTTP_NO_ERROR; /*always reinit static variables due to protothreads*/
PRINTF("Request--->\n");
//read method
PSOCK_READTO(&(conn_state->sin), ' ');
if (!is_method_handled(conn_state, conn_state->inputbuf)) {
/*method not handled*/
http_set_status(&conn_state->response, SERVICE_UNAVAILABLE_503);
conn_state->state = STATE_OUTPUT;
} else {
/*read until the end of url*/
PSOCK_READTO(&(conn_state->sin), ' ');
/*-1 is needed since it also includes space char*/
if (conn_state->inputbuf[PSOCK_DATALEN(&(conn_state->sin)) - 1] != ' ' ) {
error = HTTP_URL_TOO_LONG;
}
conn_state->inputbuf[PSOCK_DATALEN(&(conn_state->sin)) - 1] = 0;
PRINTF("Read URL:%s\n", conn_state->inputbuf);
if (error == HTTP_NO_ERROR) {
error = parse_url(conn_state, conn_state->inputbuf);
}
if (error != HTTP_NO_ERROR) {
if (error == HTTP_URL_TOO_LONG) {
http_set_status(&conn_state->response, REQUEST_URI_TOO_LONG_414);
} else {
http_set_status(&conn_state->response, BAD_REQUEST_400);
}
conn_state->state = STATE_OUTPUT;
} else {
/*read until the end of HTTP version - not used yet*/
PSOCK_READTO(&(conn_state->sin), LINE_FEED_CHAR);
PRINTF("After URL:%s\n", conn_state->inputbuf);
/*FIXME : PSOCK_READTO takes just a single delimiter so I read till the end of line
but now it may not fit in the buffer. If PSOCK_READTO would take two delimiters,
we would have read until : and <CR> so it would not be blocked.*/
/*Read the headers and store the necessary ones*/
do {
/*read the next line*/
PSOCK_READTO(&(conn_state->sin), LINE_FEED_CHAR);
conn_state->inputbuf[ PSOCK_DATALEN(&(conn_state->sin)) - 1] = 0;
/*if headers finished then stop the infinite loop*/
if (conn_state->inputbuf[0] == CARRIAGE_RETURN_CHAR || conn_state->inputbuf[0] == 0) {
PRINTF("Finished Headers!\n\n");
break;
}
parse_header(conn_state, conn_state->inputbuf);
}
while(1);
content_len = get_header(conn_state->request.headers, HTTP_HEADER_NAME_CONTENT_LENGTH);
if (content_len) {
conn_state->request.payload_len = atoi(content_len);
PRINTF("Post Data Size string: %s int: %d\n", content_len, conn_state->request.payload_len);
}
if (conn_state->request.payload_len) {
static uint16_t read_bytes = 0;
/*init the static variable again*/
read_bytes = 0;
conn_state->request.payload = allocate_buffer(conn_state->request.payload_len + 1);
if (conn_state->request.payload) {
do {
PSOCK_READBUF(&(conn_state->sin));
/*null terminate the buffer in case it is a string.*/
conn_state->inputbuf[PSOCK_DATALEN(&(conn_state->sin))] = 0;
memcpy(conn_state->request.payload + read_bytes, conn_state->inputbuf, PSOCK_DATALEN(&(conn_state->sin)));
read_bytes += PSOCK_DATALEN(&(conn_state->sin));
} while (read_bytes < conn_state->request.payload_len);
conn_state->request.payload[read_bytes++] = 0;
PRINTF("PostData => %s \n", conn_state->request.payload);
} else {
error = HTTP_MEMORY_ALLOC_ERR;
}
}
if (error == HTTP_NO_ERROR) {
if (service_cbk) {
service_cbk(&conn_state->request, &conn_state->response);
}
} else {
PRINTF("Error:%d\n",error);
http_set_status(&conn_state->response, INTERNAL_SERVER_ERROR_500);
}
conn_state->state = STATE_OUTPUT;
}
}
PSOCK_END(&(conn_state->sin));
}