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/*
* Copyright (c) 2017 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "http_write_utils.h"
#include "http_types.h"
#include "http_utils.h"
#include <net/nbuf.h>
#include <stdio.h>
uint16_t http_strlen(const char *str)
{
if (str) {
return strlen(str);
}
return 0;
}
int http_add_header(struct net_buf *tx, const char *str)
{
net_nbuf_append(tx, strlen(str), (uint8_t *)str, K_FOREVER);
return 0;
}
int http_add_chunk(struct net_buf *tx, const char *str)
{
char chunk_header[16];
char *rn = "\r\n";
uint16_t str_len;
str_len = http_strlen(str);
snprintf(chunk_header, sizeof(chunk_header), "%x\r\n", str_len);
net_nbuf_append(tx, strlen(chunk_header), chunk_header, K_FOREVER);
if (str_len) {
net_nbuf_append(tx, str_len, (uint8_t *)str, K_FOREVER);
}
net_nbuf_append(tx, strlen(rn), rn, K_FOREVER);
return 0;
}
int http_write(struct http_server_ctx *ctx, const char *http_header,
const char *html_header, const char *html_body,
const char *html_footer)
{
struct net_buf *tx;
int rc = -EINVAL;
tx = net_nbuf_get_tx(ctx->net_ctx, K_FOREVER);
printf("[%s:%d] net_nbuf_get_tx, rc: %d <%s>\n",
__func__, __LINE__, !tx, RC_STR(!tx));
if (tx == NULL) {
goto exit_routine;
}
http_add_header(tx, http_header);
if (html_header) {
http_add_chunk(tx, html_header);
}
if (html_body) {
http_add_chunk(tx, html_body);
}
if (html_footer) {
http_add_chunk(tx, html_footer);
}
/* like EOF */
http_add_chunk(tx, NULL);
rc = net_context_send(tx, NULL, 0, NULL, NULL);
printf("[%s:%d] net_context_send: %d <%s>\n",
__func__, __LINE__, rc, RC_STR(rc));
if (rc != 0) {
goto exit_routine;
}
tx = NULL;
exit_routine:
/* unref can handle NULL buffers, so we are covered */
net_nbuf_unref(tx);
return rc;
}
/* Prints the received HTTP header fields as an HTML list */
static void print_http_headers(struct http_server_ctx *ctx,
char *str, uint16_t size)
{
struct http_parser *parser = &ctx->parser;
uint16_t offset = 0;
offset = snprintf(str, size,
"<body><h1>Zephyr HTTP server</h1>"
"<h2>HTTP Header Fields</h2>\r\n<ul>\r\n");
if (offset >= size) {
return;
}
for (uint8_t i = 0; i < ctx->field_values_ctr; i++) {
struct http_field_value *kv = &ctx->field_values[i];
offset += snprintf(str + offset, size - offset,
"<li>%.*s: %.*s</li>\r\n",
kv->key_len, kv->key,
kv->value_len, kv->value);
if (offset >= size) {
return;
}
}
offset += snprintf(str + offset, size - offset, "</ul>\r\n");
if (offset >= size) {
return;
}
offset += snprintf(str + offset, size - offset,
"<h2>HTTP Method: %s</h2>\r\n",
http_method_str(parser->method));
if (offset >= size) {
return;
}
offset += snprintf(str + offset, size - offset,
"<h2>URL: %.*s</h2>\r\n",
ctx->url_len, ctx->url);
if (offset >= size) {
return;
}
snprintf(str + offset, size - offset,
"<h2>Server: %s</h2></body>\r\n", CONFIG_ARCH);
}
#define HTTP_MAX_BODY_STR_SIZE 512
static char html_body[HTTP_MAX_BODY_STR_SIZE];
int http_write_header_fields(struct http_server_ctx *ctx)
{
print_http_headers(ctx, html_body, HTTP_MAX_BODY_STR_SIZE);
return http_write(ctx, HTTP_STATUS_200_OK, HTML_STR_HEADER,
html_body, HTML_STR_FOOTER);
}
int http_write_it_works(struct http_server_ctx *ctx)
{
return http_write(ctx, HTTP_STATUS_200_OK, HTML_STR_HEADER,
"<body><h1><center>It Works!</center></h1>"
"</body>\r\n", HTML_STR_FOOTER);
}
int http_write_400_bad_request(struct http_server_ctx *ctx)
{
return http_write(ctx, HTTP_STATUS_400_BR, NULL, NULL, NULL);
}
int http_write_403_forbidden(struct http_server_ctx *ctx)
{
return http_write(ctx, HTTP_STATUS_403_FBD, NULL, NULL, NULL);
}
int http_write_404_not_found(struct http_server_ctx *ctx)
{
return http_write(ctx, HTTP_STATUS_404_NF, NULL, NULL, NULL);
}
int http_write_soft_404_not_found(struct http_server_ctx *ctx)
{
return http_write(ctx, HTTP_STATUS_200_OK, HTML_STR_HEADER,
"<body><h1><center>404 Not Found</center></h1>"
"</body>\r\n", HTML_STR_FOOTER);
}
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