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lander
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feat: paved the way for uploading pastes

c-web-server
Jef Roosens 2023-05-30 09:37:40 +02:00
parent 94b07caeb3
commit dfbd179c7a
Signed by: Jef Roosens
GPG Key ID: B75D4F293C7052DB
8 changed files with 96 additions and 77 deletions
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24
include/http.h
View File

@ -3,6 +3,7 @@
#include <regex.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "picohttpparser.h"
@ -24,6 +25,11 @@ typedef enum http_request_method {
extern const char *request_method_names[];
extern const size_t request_method_names_len;
typedef enum http_body_type {
http_body_buf = 0,
http_body_file = 1
} http_body_type;
/*
* Struct representing the specific type of request
*/
@ -35,7 +41,11 @@ typedef struct http_request {
size_t path_len;
const char *query;
size_t query_len;
char *body;
http_body_type body_type;
union {
char *buf;
FILE *file;
} body;
size_t body_len;
size_t body_received;
regmatch_t regex_groups[HTTP_MAX_REGEX_GROUPS];
@ -130,18 +140,16 @@ typedef struct http_response_header {
bool owned;
} http_response_header;
typedef enum http_response_body_type {
http_response_body_buf = 0,
http_response_body_file = 1
} http_response_body_type;
typedef struct http_response {
http_response_type status;
const char *head;
size_t head_len;
size_t head_written;
http_response_body_type body_type;
void *body;
http_body_type body_type;
union {
char *buf;
FILE *file;
} body;
size_t body_len;
size_t body_written;
// If false, the body won't be freed

4
include/lander.h
View File

@ -5,6 +5,10 @@
extern http_route lander_routes[3];
bool lander_get_index(event_loop_conn *conn);
bool lander_get_entry(event_loop_conn *conn);
bool lander_post_redirect(event_loop_conn *conn);
#endif

25
src/http_loop/http_loop_ctx.c
View File

@ -26,9 +26,13 @@ void http_loop_ctx_reset(http_loop_ctx *ctx) {
ctx->route = NULL;
ctx->current_step = 0;
if (ctx->req.body != NULL) {
free((void *)ctx->req.body);
ctx->req.body = NULL;
if (ctx->req.body_type == http_body_buf && ctx->req.body.buf != NULL) {
free(ctx->req.body.buf);
ctx->req.body.buf = NULL;
} else if (ctx->req.body_type == http_body_file &&
ctx->req.body.file != NULL) {
fclose(ctx->req.body.file);
ctx->req.body.file = NULL;
}
if (ctx->res.head != NULL) {
@ -36,16 +40,15 @@ void http_loop_ctx_reset(http_loop_ctx *ctx) {
ctx->res.head = NULL;
}
if (ctx->res.body != NULL) {
if (ctx->res.body_type == http_response_body_buf && ctx->res.owns_body) {
free((void *)ctx->res.body);
} else if (ctx->res.body_type == http_response_body_file) {
fclose(ctx->res.body);
}
if (ctx->res.body_type == http_body_buf && ctx->res.body.buf != NULL) {
free(ctx->res.body.buf);
ctx->res.body.buf = NULL;
} else if (ctx->res.body_type == http_body_file &&
ctx->res.body.file != NULL) {
fclose(ctx->res.body.file);
ctx->res.body.file = NULL;
}
ctx->res.body = NULL;
for (size_t i = 0; i < ctx->res.header_count; i++) {
if (ctx->res.headers[i].owned) {
free((void *)ctx->res.headers[i].value);

10
src/http_loop/http_loop_res.c
View File

@ -81,15 +81,15 @@ void http_loop_write_response(event_loop_conn *conn) {
size_t bytes_written;
switch (res->body_type) {
case http_response_body_buf:
memcpy(&conn->wbuf[conn->wbuf_size],
&((const char *)res->body)[res->body_written], bytes_to_write);
case http_body_buf:
memcpy(&conn->wbuf[conn->wbuf_size], &(res->body.buf)[res->body_written],
bytes_to_write);
conn->wbuf_size += bytes_to_write;
res->body_written += bytes_to_write;
break;
case http_response_body_file:
case http_body_file:
bytes_written = fread(&conn->wbuf[conn->wbuf_size], sizeof(uint8_t),
bytes_to_write, res->body);
bytes_to_write, res->body.file);
conn->wbuf_size += bytes_written;
res->body_written += bytes_written;
break;

15
src/http_loop/http_loop_tools.c
View File

@ -6,8 +6,8 @@
void http_loop_res_set_body_buf(http_loop_ctx *ctx, const char *body,
size_t body_len, bool owned) {
ctx->res.body_type = http_response_body_buf;
ctx->res.body = (void *)body;
ctx->res.body_type = http_body_buf;
ctx->res.body.buf = (char *)body;
ctx->res.body_len = body_len;
ctx->res.owns_body = owned;
}
@ -19,8 +19,8 @@ void http_loop_res_set_body_file(http_loop_ctx *ctx, const char *filename) {
// TODO error handling
FILE *f = fopen(filename, "r");
ctx->res.body_type = http_response_body_file;
ctx->res.body = f;
ctx->res.body_type = http_body_file;
ctx->res.body.file = f;
ctx->res.body_len = st.st_size;
}
@ -85,14 +85,15 @@ bool http_loop_step_body_to_buf(event_loop_conn *conn) {
return true;
}
ctx->req.body = malloc(ctx->req.body_len * sizeof(uint8_t));
ctx->req.body_type = http_body_buf;
ctx->req.body.buf = malloc(ctx->req.body_len * sizeof(uint8_t));
ctx->req.body_received = 0;
}
size_t bytes_to_copy = MIN(conn->rbuf_size - conn->rbuf_read,
ctx->req.body_len - ctx->req.body_received);
memcpy(&ctx->req.body[ctx->req.body_received], &conn->rbuf[conn->rbuf_read],
bytes_to_copy);
memcpy(&ctx->req.body.buf[ctx->req.body_received],
&conn->rbuf[conn->rbuf_read], bytes_to_copy);
ctx->req.body_received += bytes_to_copy;
return ctx->req.body_received == ctx->req.body_len;

45
src/lander/lander.c
View File

@ -2,51 +2,6 @@
#include "lander.h"
static const char index_page[] =
"<!DOCTYPE html>\n"
"<html>\n"
" <body>\n"
" <h1>r8r.be</h1>\n"
" <p>This is the URL shortener and pastebin accompanying my site, <a "
"href=\"https://rustybever.be\">The Rusty Bever</a>.</p>\n"
" </body>\n"
"</html>\n";
bool lander_get_index(event_loop_conn *conn) {
http_loop_ctx *ctx = conn->ctx;
http_loop_res_set_body_buf(ctx, index_page, sizeof(index_page) - 1, false);
conn->state = event_loop_conn_state_res;
return true;
}
bool lander_get_entry(event_loop_conn *conn) {
http_loop_ctx *ctx = conn->ctx;
const char *key = &ctx->req.path[ctx->req.regex_groups[1].rm_so];
int key_len = ctx->req.regex_groups[1].rm_eo - ctx->req.regex_groups[1].rm_so;
Entry *entry;
TrieExitCode res = trie_search_len(ctx->g->trie, &entry, key, key_len);
if (res == NotFound) {
ctx->res.status = http_not_found;
} else if (entry->type == Redirect) {
ctx->res.status = http_moved_permanently;
http_loop_res_add_header(ctx, http_header_location, entry->string, false);
} else if (entry->type == Paste) {
char fname[8 + key_len];
sprintf(fname, "pastes/%.*s", key_len, key);
http_loop_res_set_body_file(ctx, fname);
}
conn->state = event_loop_conn_state_res;
return true;
}
http_route lander_routes[] = {
{.type = http_route_literal,
.method = http_get,

48
src/lander/lander_get.c
View File

@ -0,0 +1,48 @@
#include <stdio.h>
#include "lander.h"
static const char index_page[] =
"<!DOCTYPE html>\n"
"<html>\n"
" <body>\n"
" <h1>r8r.be</h1>\n"
" <p>This is the URL shortener and pastebin accompanying my site, <a "
"href=\"https://rustybever.be\">The Rusty Bever</a>.</p>\n"
" </body>\n"
"</html>\n";
bool lander_get_index(event_loop_conn *conn) {
http_loop_ctx *ctx = conn->ctx;
http_loop_res_set_body_buf(ctx, index_page, sizeof(index_page) - 1, false);
conn->state = event_loop_conn_state_res;
return true;
}
bool lander_get_entry(event_loop_conn *conn) {
http_loop_ctx *ctx = conn->ctx;
const char *key = &ctx->req.path[ctx->req.regex_groups[1].rm_so];
int key_len = ctx->req.regex_groups[1].rm_eo - ctx->req.regex_groups[1].rm_so;
Entry *entry;
TrieExitCode res = trie_search_len(ctx->g->trie, &entry, key, key_len);
if (res == NotFound) {
ctx->res.status = http_not_found;
} else if (entry->type == Redirect) {
ctx->res.status = http_moved_permanently;
http_loop_res_add_header(ctx, http_header_location, entry->string, false);
} else if (entry->type == Paste) {
char fname[8 + key_len];
sprintf(fname, "pastes/%.*s", key_len, key);
http_loop_res_set_body_file(ctx, fname);
}
conn->state = event_loop_conn_state_res;
return true;
}

2
src/lander/lander_post.c
View File

@ -6,7 +6,7 @@ bool lander_post_redirect(event_loop_conn *conn) {
// Allocate a new buffer to pass to the trie
char *url = malloc(ctx->req.body_len + 1);
memcpy(url, ctx->req.body, ctx->req.body_len);
memcpy(url, ctx->req.body.buf, ctx->req.body_len);
url[ctx->req.body_len] = '\0';
char *key;