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|
#include "web.h"
#include "mytime.h"
#include <assert.h>
#include <sys/socket.h>
#include <string.h>
#include <sys/stat.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <microhttpd.h>
#include <sqlite3.h>
#include <cjson/cJSON.h>
#include <fcntl.h>
#define PAGE "<html><head><title>libmicrohttpd demo</title>"\
"</head><body>libmicrohttpd demo</body></html>"
static void sqliteError(void *pArg, int iErrCode, const char *zMsg) {
// @CLEANUP: We should stuff these somewhere, but for now just print it
fprintf(stderr, "(%d) %s\n", iErrCode, zMsg);
}
static int generate_secret(char *out) {
unsigned char bytes[16];
int fd = open("/dev/urandom", O_RDONLY);
if (fd < 0) return -1;
ssize_t n = read(fd, bytes, 16);
close(fd);
if (n != 16) return -1;
static const char hex[] = "0123456789abcdef";
for (int i = 0; i < 16; i++) {
out[i*2] = hex[(bytes[i] >> 4) & 0x0f];
out[i*2+1] = hex[bytes[i] & 0x0f];
}
out[32] = '\0';
return 0;
}
void prepare_database(struct App *app) {
// @CLEANUP: Move this to main? doesn't belong here at least
sqlite3_config(SQLITE_CONFIG_LOG, sqliteError, NULL);
sqlite3_config(SQLITE_CONFIG_URI, 1);
int err;
printf("Running migrations against %s\n", app->dbname);
sqlite3 *conn;
if((err = sqlite3_open(app->dbname, &conn)) != SQLITE_OK) {
fprintf(stderr, "(%d) %s\n", err, sqlite3_errmsg(conn));
abort();
}
sqlite3_db_config(conn, SQLITE_DBCONFIG_ENABLE_FKEY, 1, NULL);
if(sqlite3_exec(conn, "CREATE TABLE IF NOT EXISTS migration (id INTEGER PRIMARY KEY NOT NULL)", NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "SELECT MAX(id) FROM migration", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
uint64_t maxVersion = 0;
while((err = sqlite3_step(stmt)) == SQLITE_ROW) {
maxVersion = sqlite3_column_int64(stmt, 0);
}
if(err != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
if(maxVersion < 1) {
char *prog =
"BEGIN TRANSACTION;"
"CREATE TABLE backups ("
"id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "
"client TEXT NOT NULL, "
"status TEXT NOT NULL, "
"started TEXT NOT NULL, "
"completed TEXT "
") STRICT";
if(sqlite3_exec(conn, prog, NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "INSERT INTO migration (id) VALUES (?1)", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, 1) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
if(sqlite3_exec(conn, "COMMIT TRANSACTION", NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
}
if(maxVersion < 2) {
char *prog =
"BEGIN TRANSACTION;"
"CREATE TABLE clients ("
"id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "
"name TEXT NOT NULL "
") STRICT;"
"INSERT INTO clients(name) "
"SELECT b.client "
"FROM backups b "
"GROUP BY b.client;"
"CREATE TABLE backups_next ("
"id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "
"client INTEGER NOT NULL, "
"status TEXT NOT NULL, "
"started TEXT NOT NULL, "
"completed TEXT ,"
"FOREIGN KEY(client) REFERENCES clients(id)"
") STRICT;"
"INSERT INTO backups_next(id, client, status, started, completed) "
"SELECT b.id, c.id, b.status, b.started, b.completed "
"FROM backups b "
"JOIN clients c ON b.client = c.name;"
"DROP TABLE backups;"
"ALTER TABLE backups_next RENAME TO backups;";
if(sqlite3_exec(conn, prog, NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "INSERT INTO migration (id) VALUES (?1)", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, 2) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
if(sqlite3_exec(conn, "COMMIT TRANSACTION", NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
}
if(maxVersion < 3) {
char *prog =
"BEGIN TRANSACTION;"
"CREATE UNIQUE INDEX clients_name ON clients(name)";
if(sqlite3_exec(conn, prog, NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "INSERT INTO migration (id) VALUES (?1)", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, 3) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
if(sqlite3_exec(conn, "COMMIT TRANSACTION", NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
}
if(maxVersion < 4) {
char *prog =
"BEGIN TRANSACTION;"
"ALTER TABLE clients ADD COLUMN secret TEXT NOT NULL DEFAULT ''";
if(sqlite3_exec(conn, prog, NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "INSERT INTO migration (id) VALUES (?1)", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, 4) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
if(sqlite3_exec(conn, "COMMIT TRANSACTION", NULL, NULL, NULL) != SQLITE_OK) {
abort();
}
}
}
enum ReportEvent {
REV_BEGIN,
REV_FINISH,
};
// @CLEANUP: This should live somewhere else, but I don't have a spot for it yet.
// Returns 0 on success, -1 on error, -2 on secret mismatch
int submit_report(struct App *app, char *client, char *secret, enum ReportEvent event) {
sqlite3 *conn;
int err;
if((err = sqlite3_open(app->dbname, &conn)) != SQLITE_OK) {
abort();
}
struct timespec now = get_current_time();
int64_t clientId;
{
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "SELECT id, secret FROM clients WHERE name = ?1", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_text(stmt, 1, client, -1, SQLITE_STATIC) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_ROW) {
abort();
}
if(sqlite3_column_type(stmt, 0) == SQLITE_NULL) {
abort();
}
clientId = sqlite3_column_int64(stmt, 0);
const char *stored_secret = (const char *)sqlite3_column_text(stmt, 1);
if(stored_secret == NULL || strcmp(stored_secret, secret) != 0) {
sqlite3_finalize(stmt);
sqlite3_close(conn);
return -2;
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
}
switch(event) {
case REV_BEGIN: {
sqlite3_stmt *stmt;
// Mark any existing RUNNING backup as INTERRUPTED
if(sqlite3_prepare_v2(conn, "UPDATE backups SET status = 'INTERRUPTED', completed = datetime(?1, 'unixepoch', 'subsec') WHERE client = ?2 AND status = 'RUNNING'", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_double(stmt, 1, TIME_AS_FLOAT(now)) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 2, clientId) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
stmt = NULL;
// Insert the new backup
if(sqlite3_prepare_v2(conn, "INSERT INTO backups (client, status, started) VALUES (?1, ?2, datetime(?3, 'unixepoch', 'subsec'))", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, clientId) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_text(stmt, 2, "RUNNING", -1, SQLITE_STATIC) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_double(stmt, 3, TIME_AS_FLOAT(now)) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
break;
}
case REV_FINISH: {
uint64_t backupId;
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "SELECT id FROM backups WHERE client = ?1 AND status = 'RUNNING'", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, clientId) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_ROW) {
abort();
}
if(sqlite3_column_type(stmt, 0) == SQLITE_NULL) {
abort();
}
backupId = sqlite3_column_int64(stmt, 0);
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
stmt = NULL;
if(sqlite3_prepare_v2(conn, "UPDATE backups SET status = ?1, completed = datetime(?2, 'unixepoch', 'subsec') WHERE id = ?3", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_text(stmt, 1, "FINISHED", -1, SQLITE_STATIC) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_double(stmt, 2, TIME_AS_FLOAT(now)) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 3, backupId) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
break;
}
}
if(sqlite3_close(conn) != SQLITE_OK) {
abort();
}
return 0;
}
int create_client(struct Request *req, char *name, struct CreateClientResult *result) {
sqlite3 *conn;
int err;
if((err = sqlite3_open(req->server->app->dbname, &conn)) != SQLITE_OK) {
abort();
}
if(generate_secret(result->secret) != 0) {
abort();
}
{
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "INSERT INTO clients (name, secret) VALUES (?1, ?2)", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_text(stmt, 1, name, -1, SQLITE_STATIC) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_text(stmt, 2, result->secret, -1, SQLITE_STATIC) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
result->id = sqlite3_last_insert_rowid(conn);
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
}
if(sqlite3_close(conn) != SQLITE_OK) {
abort();
}
return 0;
}
int delete_client(struct Request *req, int64_t client_id) {
sqlite3 *conn;
if(sqlite3_open(req->server->app->dbname, &conn) != SQLITE_OK) {
abort();
}
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "DELETE FROM clients WHERE id = ?1", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, client_id) != SQLITE_OK) {
abort();
}
if(sqlite3_step(stmt) != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
if(sqlite3_close(conn) != SQLITE_OK) {
abort();
}
return 0;
}
int list_clients(struct Request *req, struct ListClientResult *result) {
sqlite3 *conn;
int err;
if((err = sqlite3_open(req->server->app->dbname, &conn)) != SQLITE_OK) {
abort();
}
{
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "SELECT c.id, c.name, c.secret FROM clients c WHERE c.id > ?1 ORDER BY c.id ASC LIMIT ?2", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, -1) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 2, 16) != SQLITE_OK) {
abort();
}
int ret;
int index = 0;
while((ret = sqlite3_step(stmt)) == SQLITE_ROW) {
assert(index < 16);
if(sqlite3_column_type(stmt, 0) == SQLITE_NULL) {
abort();
}
int64_t clientId = sqlite3_column_int64(stmt, 0);
const uint8_t *name = sqlite3_column_text(stmt, 1);
const uint8_t *secret = sqlite3_column_text(stmt, 2);
result->clients[index].id = clientId;
strncpy(result->clients[index].name, (char*)name, CLIENT_NAME_MAX);
strncpy(result->clients[index].secret, (char*)secret, CLIENT_SECRET_LEN);
index++;
}
if(ret != SQLITE_DONE) {
abort();
}
result->clients_len = index;
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
}
if(sqlite3_close(conn) != SQLITE_OK) {
abort();
}
return 0;
}
int get_client_with_backups(struct Request *req, int64_t client_id, struct GetClientResult *result) {
sqlite3 *conn;
int err;
if((err = sqlite3_open(req->server->app->dbname, &conn)) != SQLITE_OK) {
abort();
}
result->found = 0;
// Query 1: Get client info
{
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "SELECT id, name, secret FROM clients WHERE id = ?1", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, client_id) != SQLITE_OK) {
abort();
}
int ret = sqlite3_step(stmt);
if(ret == SQLITE_ROW) {
result->found = 1;
result->id = sqlite3_column_int64(stmt, 0);
const uint8_t *name = sqlite3_column_text(stmt, 1);
const uint8_t *secret = sqlite3_column_text(stmt, 2);
strncpy(result->name, (char*)name, CLIENT_NAME_MAX);
strncpy(result->secret, (char*)secret, CLIENT_SECRET_LEN);
} else if(ret != SQLITE_DONE) {
abort();
}
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
}
if(!result->found) {
if(sqlite3_close(conn) != SQLITE_OK) {
abort();
}
return 0;
}
// Query 2: Get backups for this client
{
sqlite3_stmt *stmt;
if(sqlite3_prepare_v2(conn, "SELECT id, status, started, completed FROM backups WHERE client = ?1 ORDER BY started DESC LIMIT 50", -1, &stmt, NULL) != SQLITE_OK) {
abort();
}
if(sqlite3_bind_int64(stmt, 1, client_id) != SQLITE_OK) {
abort();
}
int ret;
int index = 0;
while((ret = sqlite3_step(stmt)) == SQLITE_ROW) {
if(index >= MAX_BACKUPS_DISPLAY) break;
result->backups[index].id = sqlite3_column_int64(stmt, 0);
const uint8_t *status = sqlite3_column_text(stmt, 1);
const uint8_t *started = sqlite3_column_text(stmt, 2);
const uint8_t *completed = sqlite3_column_text(stmt, 3);
strncpy(result->backups[index].status, status ? (char*)status : "", BACKUP_STATUS_MAX);
strncpy(result->backups[index].started, started ? (char*)started : "", BACKUP_DATETIME_MAX);
strncpy(result->backups[index].completed, completed ? (char*)completed : "", BACKUP_DATETIME_MAX);
index++;
}
if(ret != SQLITE_DONE && ret != SQLITE_ROW) {
abort();
}
result->backups_len = index;
if(sqlite3_finalize(stmt) != SQLITE_OK) {
abort();
}
}
if(sqlite3_close(conn) != SQLITE_OK) {
abort();
}
return 0;
}
static char *render_clients_page(struct Request *request, size_t *out_len) {
int ret;
struct ListClientResult *result = malloc(sizeof(struct ListClientResult) + sizeof(struct ListClientResultClient) * 16);
ret = list_clients(request, result);
if(ret != 0) {
free(result);
return NULL;
}
char *buf = NULL;
size_t buf_len = 0;
FILE *f = open_memstream(&buf, &buf_len);
if (!f) {
free(result);
return NULL;
}
fprintf(f,
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>Clients</title>\n"
"</head>\n"
"<body>\n"
" <h1>Clients</h1>\n"
" <table border=\"1\">\n"
" <tr><th>Name</th><th>Secret</th><th>Actions</th></tr>\n");
for (int i = 0; i < result->clients_len; i++) {
fprintf(f,
" <tr>\n"
" <td><a href=\"/client/%ld\">%s</a></td>\n"
" <td>%s</td>\n"
" <td>\n"
" <form method=\"POST\" action=\"/clients/delete\" style=\"display:inline\">\n"
" <input type=\"hidden\" name=\"client_id\" value=\"%ld\">\n"
" <button type=\"submit\">Delete</button>\n"
" </form>\n"
" </td>\n"
" </tr>\n",
result->clients[i].id,
result->clients[i].name,
result->clients[i].secret,
result->clients[i].id
);
}
fprintf(f,
" </table>\n"
" <h2>Add New Client</h2>\n"
" <form method=\"POST\" action=\"/clients\">\n"
" <input type=\"text\" name=\"name\" maxlength=\"31\" placeholder=\"Client name\" required>\n"
" <button type=\"submit\">Add Client</button>\n"
" </form>\n"
"</body>\n"
"</html>\n");
fclose(f);
*out_len = buf_len;
free(result);
return buf;
}
static char *render_client_detail_page(struct Request *request, int64_t client_id, size_t *out_len) {
struct GetClientResult *result = malloc(sizeof(struct GetClientResult) + sizeof(struct BackupRecord) * MAX_BACKUPS_DISPLAY);
int ret = get_client_with_backups(request, client_id, result);
if(ret != 0) {
free(result);
return NULL;
}
if(!result->found) {
free(result);
return NULL;
}
char *buf = NULL;
size_t buf_len = 0;
FILE *f = open_memstream(&buf, &buf_len);
if (!f) {
free(result);
return NULL;
}
fprintf(f,
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
" <title>Client: %s</title>\n"
"</head>\n"
"<body>\n"
" <p><a href=\"/clients\">Clients</a> > %s</p>\n"
" <h1>Client: %s</h1>\n"
" <h2>Details</h2>\n"
" <table border=\"1\">\n"
" <tr><th>ID</th><td>%ld</td></tr>\n"
" <tr><th>Name</th><td>%s</td></tr>\n"
" <tr><th>Secret</th><td>%s</td></tr>\n"
" </table>\n",
result->name,
result->name,
result->name,
result->id,
result->name,
result->secret
);
fprintf(f,
" <h2>Submit Report</h2>\n"
" <p>Use this curl command to submit a backup report:</p>\n"
" <pre>curl -X POST http://%s/api/report \\\n"
" -H \"Content-Type: application/json\" \\\n"
" -d '{\"client\": \"%s\", \"secret\": \"%s\", \"event\": \"begin_backup\"}'</pre>\n"
" <p>Replace <code>begin_backup</code> with <code>end_backup</code> to mark completion.</p>\n",
request->host ? request->host : "localhost",
result->name,
result->secret
);
fprintf(f, " <h2>Backup History</h2>\n");
if(result->backups_len == 0) {
fprintf(f, " <p>No backups recorded.</p>\n");
} else {
fprintf(f,
" <table border=\"1\">\n"
" <tr><th>ID</th><th>Status</th><th>Started</th><th>Completed</th></tr>\n");
for (int i = 0; i < result->backups_len; i++) {
fprintf(f,
" <tr>\n"
" <td>%ld</td>\n"
" <td>%s</td>\n"
" <td>%s</td>\n"
" <td>%s</td>\n"
" </tr>\n",
result->backups[i].id,
result->backups[i].status,
result->backups[i].started,
result->backups[i].completed[0] ? result->backups[i].completed : "-"
);
}
fprintf(f, " </table>\n");
}
fprintf(f,
"</body>\n"
"</html>\n");
fclose(f);
*out_len = buf_len;
free(result);
return buf;
}
static enum MHD_Result create_post_collector(struct PostCollector *c) {
c->data = malloc(512);
c->size = 0;
c->capacity = 512;
return MHD_YES;
}
static enum MHD_Result collect_post(struct PostCollector *c, const char *data, size_t *data_len) {
size_t newSize = c->size + *data_len;
if(newSize > c->capacity) {
while(newSize > c->capacity) c->capacity *= 2;
c->data = realloc(c->data, c->capacity);
}
memcpy(c->data + c->size, data, *data_len);
c->size = newSize;
return MHD_YES;
}
static enum MHD_Result destroy_post_collector(struct PostCollector *c) {
if(c->capacity != 0) {
free(c->data);
c->capacity = 0;
}
return MHD_YES;
}
static enum MHD_Result
form_iterator(void *cls,
enum MHD_ValueKind kind,
const char *key,
const char *filename,
const char *content_type,
const char *transfer_encoding,
const char *data,
uint64_t off,
size_t size)
{
struct Request *request = cls;
if (strcmp(key, "name") == 0 && off + size < CLIENT_NAME_MAX) {
memcpy(request->form.name + off, data, size);
request->form.name[off + size] = '\0';
request->form.name_set = 1;
} else if (strcmp(key, "client_id") == 0 && off == 0) {
char buf[32] = {0};
size_t copy_size = size < 31 ? size : 31;
memcpy(buf, data, copy_size);
request->form.client_id = strtoll(buf, NULL, 10);
request->form.client_id_set = 1;
}
return MHD_YES;
}
static enum MHD_Result handler(
void *cls,
struct MHD_Connection *connection,
const char *url,
const char *method,
const char *version,
const char *upload_data,
size_t *upload_data_size,
void **ptr
) {
struct Server *server = cls;
int ret;
// For the first call where con_cls points at NULL we have to create the
// connection state
struct Request *request = *ptr;
if (request == NULL) {
request = calloc(1, sizeof(struct Request));
if(request == NULL) {
return MHD_NO;
}
*ptr = request;
request->server = server;
request->host = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Host");
if(strcmp(method, "POST") == 0) {
if(strcmp(url, "/clients") == 0 || strcmp(url, "/clients/delete") == 0) {
request->post_proc = MHD_create_post_processor(
connection, 1024, &form_iterator, request);
if (request->post_proc == NULL) {
free(request);
return MHD_NO;
}
} else {
create_post_collector(&request->pp);
}
}
return MHD_YES;
}
if(strcmp(method, "POST") == 0) {
if (request->post_proc != NULL) {
if (*upload_data_size != 0) {
MHD_post_process(request->post_proc, upload_data, *upload_data_size);
*upload_data_size = 0;
return MHD_YES;
}
} else {
collect_post(&request->pp, upload_data, upload_data_size);
if (*upload_data_size != 0) {
*upload_data_size = 0;
return MHD_YES;
}
}
if(strcmp(url, "/clients") == 0) {
MHD_destroy_post_processor(request->post_proc);
request->post_proc = NULL;
if (!request->form.name_set || request->form.name[0] == '\0') {
return MHD_NO;
}
struct CreateClientResult result;
ret = create_client(request, request->form.name, &result);
if(ret != 0) return MHD_NO;
// Post-Redirect-Get: redirect back to GET /clients
struct MHD_Response *response = MHD_create_response_from_buffer(
0, "", MHD_RESPMEM_PERSISTENT);
ret = MHD_add_response_header(response, "Location", "/clients");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(connection, MHD_HTTP_SEE_OTHER, response);
MHD_destroy_response(response);
return ret;
} else if(strcmp(url, "/clients/delete") == 0) {
MHD_destroy_post_processor(request->post_proc);
request->post_proc = NULL;
if (!request->form.client_id_set || request->form.client_id <= 0) {
return MHD_NO;
}
ret = delete_client(request, request->form.client_id);
if(ret != 0) return MHD_NO;
struct MHD_Response *response = MHD_create_response_from_buffer(
0, "", MHD_RESPMEM_PERSISTENT);
ret = MHD_add_response_header(response, "Location", "/clients");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(connection, MHD_HTTP_SEE_OTHER, response);
MHD_destroy_response(response);
return ret;
} else if(strcmp(url, "/api/report") == 0) {
cJSON *rootJson = cJSON_ParseWithLength(request->pp.data, request->pp.size);
cJSON *clientJson = cJSON_GetObjectItemCaseSensitive(rootJson, "client");
if(!cJSON_IsString(clientJson) || clientJson->valuestring == NULL) {
abort();
}
cJSON *secretJson = cJSON_GetObjectItemCaseSensitive(rootJson, "secret");
if(!cJSON_IsString(secretJson) || secretJson->valuestring == NULL) {
abort();
}
cJSON *eventJson = cJSON_GetObjectItemCaseSensitive(rootJson, "event");
if(!cJSON_IsString(eventJson) || eventJson->valuestring == NULL) {
abort();
}
enum ReportEvent event;
if(strcmp(eventJson->valuestring, "begin_backup") == 0) {
event = REV_BEGIN;
} else if(strcmp(eventJson->valuestring, "end_backup") == 0) {
event = REV_FINISH;
} else {
abort();
}
ret = submit_report(server->app, clientJson->valuestring, secretJson->valuestring, event);
if(ret == -2) {
cJSON_Delete(rootJson);
destroy_post_collector(&request->pp);
struct MHD_Response *response = MHD_create_response_from_buffer(
0,
"",
MHD_RESPMEM_PERSISTENT
);
ret = MHD_add_response_header(response, "Content-Type", "application/json");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(
connection,
MHD_HTTP_UNAUTHORIZED,
response
);
MHD_destroy_response(response);
return ret;
}
if(ret != 0) {
// Should actually return an error page, but this will do for now
return MHD_NO;
}
cJSON_Delete(rootJson);
// We've taken in all the data, now we can use it
destroy_post_collector(&request->pp);
struct MHD_Response *response = MHD_create_response_from_buffer(
0,
"",
MHD_RESPMEM_PERSISTENT
);
ret = MHD_add_response_header(response, "Content-Type", "application/json");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(
connection,
MHD_HTTP_NO_CONTENT,
response
);
MHD_destroy_response(response);
return ret;
} else if(strcmp(url, "/api/client") == 0) {
cJSON *rootJson = cJSON_ParseWithLength(request->pp.data, request->pp.size);
cJSON *nameJson = cJSON_GetObjectItemCaseSensitive(rootJson, "name");
if(!cJSON_IsString(nameJson) || nameJson->valuestring == NULL) {
abort();
}
struct CreateClientResult result;
ret = create_client(request, nameJson->valuestring, &result);
if(ret != 0) {
// Should actually return an error page, but this will do for now
return MHD_NO;
}
cJSON_Delete(rootJson);
// We've taken in all the data, now we can use it
destroy_post_collector(&request->pp);
char *buf = malloc(1024);
size_t buf_len = snprintf(buf, 1024, "{ \"id\": \"%ld\", \"secret\": \"%s\" }", result.id, result.secret);
if(buf_len >= 1024) {
abort();
}
struct MHD_Response *response = MHD_create_response_from_buffer(
buf_len,
buf,
MHD_RESPMEM_MUST_FREE
);
ret = MHD_add_response_header(response, "Content-Type", "application/json");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(
connection,
MHD_HTTP_OK,
response
);
MHD_destroy_response(response);
return ret;
} else {
// Not found
destroy_post_collector(&request->pp);
struct MHD_Response *response = MHD_create_response_from_buffer(
0,
"",
MHD_RESPMEM_PERSISTENT
);
ret = MHD_add_response_header(response, "Content-Type", "application/json");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(
connection,
MHD_HTTP_NOT_FOUND,
response
);
MHD_destroy_response(response);
return ret;
}
} else if (strcmp(method, "GET") == 0) {
if (*upload_data_size != 0) return MHD_NO;
if(strcmp(url, "/clients") == 0) {
size_t html_len;
char *html = render_clients_page(request, &html_len);
if (!html) {
return MHD_NO;
}
struct MHD_Response *response = MHD_create_response_from_buffer(
html_len,
html,
MHD_RESPMEM_MUST_FREE
);
ret = MHD_add_response_header(response, "Content-Type", "text/html");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(
connection,
MHD_HTTP_OK,
response
);
MHD_destroy_response(response);
return ret;
} else if (strncmp(url, "/client/", 8) == 0) {
int64_t client_id;
if (sscanf(url + 8, "%ld", &client_id) != 1 || client_id <= 0) {
// Bad Request
struct MHD_Response *response = MHD_create_response_from_buffer(
0, "", MHD_RESPMEM_PERSISTENT);
ret = MHD_queue_response(connection, MHD_HTTP_BAD_REQUEST, response);
MHD_destroy_response(response);
return ret;
}
size_t html_len;
char *html = render_client_detail_page(request, client_id, &html_len);
if (!html) {
// Not Found
struct MHD_Response *response = MHD_create_response_from_buffer(
0, "", MHD_RESPMEM_PERSISTENT);
ret = MHD_queue_response(connection, MHD_HTTP_NOT_FOUND, response);
MHD_destroy_response(response);
return ret;
}
struct MHD_Response *response = MHD_create_response_from_buffer(
html_len,
html,
MHD_RESPMEM_MUST_FREE
);
ret = MHD_add_response_header(response, "Content-Type", "text/html");
if(ret != MHD_YES) return ret;
ret = MHD_queue_response(
connection,
MHD_HTTP_OK,
response
);
MHD_destroy_response(response);
return ret;
} else {
struct MHD_Response *response = MHD_create_response_from_buffer(
strlen(server->page),
(void *)server->page,
MHD_RESPMEM_PERSISTENT
);
ret = MHD_queue_response(
connection,
MHD_HTTP_OK,
response
);
MHD_destroy_response(response);
return ret;
}
}
return MHD_NO;
}
static void request_completed_callback (
void *cls,
struct MHD_Connection *connection,
void **con_cls,
enum MHD_RequestTerminationCode toe
) {
struct Request *request = *con_cls;
if (request->post_proc != NULL) {
MHD_destroy_post_processor(request->post_proc);
}
destroy_post_collector(&request->pp);
free(request);
}
static struct MHD_Daemon *d = NULL;
int web_begin(struct Server *server, int port) {
assert(d == NULL);
server->page = PAGE;
d = MHD_start_daemon(
MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DUAL_STACK,
port,
NULL, NULL,
&handler, server,
MHD_OPTION_NOTIFY_COMPLETED, &request_completed_callback, NULL,
MHD_OPTION_END
);
if (d == NULL) return 1;
return 0;
}
int web_join(struct Server *server) {
assert(d != NULL);
MHD_stop_daemon(d);
d = NULL;
return 0;
}
|
