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ios_webkit_debug_proxy.c
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// Google BSD license https://developers.google.com/google-bsd-license
// Copyright 2012 Google Inc. [email protected]
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include "char_buffer.h"
#include "device_listener.h"
#include "hash_table.h"
#include "ios_webkit_debug_proxy.h"
#include "rpc.h"
#include "webinspector.h"
#include "websocket.h"
#include "strndup.h"
struct iwdp_idl_struct;
typedef struct iwdp_idl_struct *iwdp_idl_t;
struct iwdp_private {
// our device listener
iwdp_idl_t idl;
// our null-id registry (:9221) plus per-device ports (:9222-...)
ht_t device_id_to_iport;
// frontend url, e.g. "http://bar.com/devtools.html" or "/foo/inspector.html"
char *frontend;
char *sim_wi_socket_addr;
};
#define TYPE_IDL 1
#define TYPE_IPORT 2
#define TYPE_IWI 3
#define TYPE_IWS 4
#define TYPE_IFS 5
/*!
* Struct type id, for iwdp_on_recv/etc "switch" use.
*
* Each sub-struct has a "*_fd".
*/
typedef struct {
int type;
} iwdp_type_struct;
typedef iwdp_type_struct *iwdp_type_t;
/*!
* Device add/remove listener.
*/
struct iwdp_idl_struct {
iwdp_type_struct type;
iwdp_t self;
dl_t dl;
int dl_fd;
};
iwdp_idl_t iwdp_idl_new();
void iwdp_idl_free(iwdp_idl_t idl);
struct iwdp_iwi_struct;
typedef struct iwdp_iwi_struct *iwdp_iwi_t;
/*!
* browser listener.
*/
struct iwdp_iport_struct {
iwdp_type_struct type;
iwdp_t self;
// browser port, e.g. 9222
int port;
int s_fd;
// true if iwdp_on_attach has succeeded and we should restore this port
// if the device is reattach
bool is_sticky;
// all websocket clients on this port
// key owned by iws->ws_id
ht_t ws_id_to_iws;
// iOS device_id, e.g. ddc86a518cd948e13bbdeadbeef00788ea35fcf9
char *device_id;
char *device_name;
int device_os_version;
// null if the device is detached
iwdp_iwi_t iwi;
};
typedef struct iwdp_iport_struct *iwdp_iport_t;
iwdp_iport_t iwdp_iport_new();
void iwdp_iport_free(iwdp_iport_t iport);
char *iwdp_iports_to_text(iwdp_iport_t *iports, bool want_json,
const char *host);
/*!
* WebInpsector.
*/
struct iwdp_iwi_struct {
iwdp_type_struct type;
iwdp_iport_t iport; // owner
// webinspector
wi_t wi;
int wi_fd;
char *connection_id;
rpc_t rpc; // plist parser
rpc_app_t app;
bool connected;
uint32_t max_page_num; // > 0
ht_t app_id_to_true; // set of app_ids
ht_t page_num_to_ipage;
};
iwdp_iwi_t iwdp_iwi_new(bool partials_supported, bool *is_debug);
void iwdp_iwi_free(iwdp_iwi_t iwi);
struct iwdp_ifs_struct;
typedef struct iwdp_ifs_struct *iwdp_ifs_t;
struct iwdp_ipage_struct;
typedef struct iwdp_ipage_struct *iwdp_ipage_t;
/*!
* WebSocket connection.
*/
struct iwdp_iws_struct {
iwdp_type_struct type;
iwdp_iport_t iport; // owner
// browser client
int ws_fd;
ws_t ws;
char *ws_id; // devtools sender_id
// set if the resource is /devtools/page/<page_num>
uint32_t page_num;
// assert (!page_num ||
// (ipage && ipage->page_num == page_num && ipage->iws == this))
//
// shortcut pointer to the page with our page_num, but only if
// we own that page (i.e. ipage->iws == this). Another iws can "steal" our
// page away and set ipage == NULL, but we keep our page_num so we can report
// a useful error.
iwdp_ipage_t ipage; // owner is iwi->page_num_to_ipage
// set if the resource is /devtools/<non-page>
iwdp_ifs_t ifs;
};
typedef struct iwdp_iws_struct *iwdp_iws_t;
iwdp_iws_t iwdp_iws_new(bool *is_debug);
void iwdp_iws_free(iwdp_iws_t iws);
/*!
* Static file-system page request.
*/
struct iwdp_ifs_struct {
iwdp_type_struct type;
iwdp_iws_t iws; // owner
// static server
int fs_fd;
};
iwdp_ifs_t iwdp_ifs_new();
void iwdp_ifs_free(iwdp_ifs_t ifs);
// page info
struct iwdp_ipage_struct {
// browser
uint32_t page_num;
// webinspector, which can lag re: on_applicationSentListing
char *app_id;
uint32_t page_id;
char *connection_id;
char *title;
char *url;
char *sender_id;
// set if being inspected, limit one client per page
// owner is iport->ws_id_to_iws
iwdp_iws_t iws;
};
iwdp_ipage_t iwdp_ipage_new();
void iwdp_ipage_free(iwdp_ipage_t ipage);
int iwdp_ipage_cmp(const void *a, const void *b);
char *iwdp_ipages_to_text(iwdp_ipage_t *ipages, bool want_json,
const char *device_id, const char *device_name,
const char *frontend_url, const char *host, int port);
// file extension to Content-Type
const char *EXT_TO_MIME[][2] = {
{"css", "text/css"},
{"gif", "image/gif; charset=binary"},
{"html", "text/html; charset=UTF-8"},
{"ico", "image/x-icon"},
{"js", "application/javascript"},
{"json", "application/json; charset=UTF-8"},
{"png", "image/png; charset=binary"},
{"txt", "text/plain"},
};
iwdp_status iwdp_get_content_type(const char *path, bool is_local,
char **to_mime);
ws_status iwdp_start_devtools(iwdp_ipage_t ipage, iwdp_iws_t iws);
ws_status iwdp_stop_devtools(iwdp_ipage_t ipage);
int iwdp_update_string(char **old_value, const char *new_value);
//
// logging
//
iwdp_status iwdp_on_error(iwdp_t self, const char *format, ...) {
va_list args;
va_start(args, format);
vfprintf(stderr, format, args);
fprintf(stderr, "\n");
va_end(args);
return IWDP_ERROR;
}
void iwdp_log_connect(iwdp_iport_t iport) {
if (iport->device_id) {
printf("Connected :%d to %s (%s)\n", iport->port, iport->device_name,
iport->device_id);
} else {
printf("Listing devices on :%d\n", iport->port);
}
}
void iwdp_log_disconnect(iwdp_iport_t iport) {
if (iport->iwi && iport->iwi->connected) {
printf("Disconnected :%d from %s (%s)\n", iport->port,
iport->device_name, iport->device_id);
} else {
printf("Unable to connect to %s (%s)\n Please"
" verify that Settings > Safari > Advanced > Web Inspector = ON\n",
iport->device_name, iport->device_id);
}
}
//
// device_listener
//
dl_status iwdp_listen(iwdp_t self, const char *device_id) {
iwdp_private_t my = self->private_state;
// see if this device was previously attached
ht_t iport_ht = my->device_id_to_iport;
iwdp_iport_t iport = (iwdp_iport_t)ht_get_value(iport_ht, device_id);
if (iport && iport->s_fd > 0) {
return self->on_error(self, "%s already on :%d", device_id,
iport->port);
}
int port = (iport ? iport->port : -1);
// select new port
int min_port = -1;
int max_port = -1;
if (self->select_port && self->select_port(self, device_id,
&port, &min_port, &max_port)) {
return (device_id ? DL_ERROR : DL_SUCCESS);
}
if (port < 0 && (min_port < 0 || max_port < min_port)) {
return (device_id ? DL_ERROR : DL_SUCCESS); // ignore this device
}
if (!iport) {
iport = iwdp_iport_new();
iport->device_id = (device_id ? strdup(device_id) : NULL);
ht_put(iport_ht, iport->device_id, iport);
}
iport->self = self;
// listen for browser clients
int s_fd = -1;
if (port > 0) {
s_fd = self->listen(self, port);
}
if (s_fd < 0 && (min_port > 0 && max_port >= min_port)) {
iwdp_iport_t *iports = (iwdp_iport_t *)ht_values(iport_ht);
int p;
for (p = min_port; p <= max_port; p++) {
bool is_taken = false;
iwdp_iport_t *ipp;
for (ipp = iports; *ipp; ipp++) {
if ((*ipp)->port == p) {
is_taken = true;
break;
}
}
if (!is_taken && p != port) {
s_fd = self->listen(self, p);
if (s_fd > 0) {
port = p;
break;
}
}
}
free(iports);
}
if (s_fd < 0) {
return self->on_error(self, "Unable to bind %s on port %d-%d",
(device_id ? device_id : "\"devices list\""),
min_port, max_port);
}
if (self->add_fd(self, s_fd, NULL, iport, true)) {
return self->on_error(self, "add_fd s_fd=%d failed", s_fd);
}
iport->s_fd = s_fd;
iport->port = port;
if (!device_id) {
iwdp_log_connect(iport);
}
return DL_SUCCESS;
}
iwdp_status iwdp_start(iwdp_t self) {
iwdp_private_t my = self->private_state;
if (my->idl) {
return self->on_error(self, "Already started?");
}
if (iwdp_listen(self, NULL)) {
// Okay, keep going
}
iwdp_idl_t idl = iwdp_idl_new();
idl->self = self;
int dl_fd = self->subscribe(self);
if (dl_fd < 0) { // usbmuxd isn't running
return self->on_error(self, "No device found, is it plugged in?");
}
idl->dl_fd = dl_fd;
if (self->add_fd(self, dl_fd, NULL, idl, false)) {
return self->on_error(self, "add_fd failed");
}
dl_t dl = idl->dl;
if (dl->start(dl)) {
return self->on_error(self, "Unable to start device_listener");
}
// TODO add iOS simulator listener
// for now we'll fake a callback
dl->on_attach(dl, "SIMULATOR", -1);
return IWDP_SUCCESS;
}
dl_status iwdp_send_to_dl(dl_t dl, const char *buf, size_t length) {
iwdp_idl_t idl = (iwdp_idl_t)dl->state;
iwdp_t self = idl->self;
int dl_fd = idl->dl_fd;
return self->send(self, dl_fd, buf, length);
}
dl_status iwdp_on_attach(dl_t dl, const char *device_id, int device_num) {
iwdp_t self = ((iwdp_idl_t)dl->state)->self;
if (!device_id) {
return self->on_error(self, "Null device_id");
}
if (iwdp_listen(self, device_id)) {
// Couldn't bind browser port, or we're simply ignoring this device
return DL_SUCCESS;
}
iwdp_private_t my = self->private_state;
// Return "success" on most errors, otherwise we'll kill our
// device_listener and, via iwdp_idl_close, all our iports!
ht_t iport_ht = my->device_id_to_iport;
iwdp_iport_t iport = (iwdp_iport_t)ht_get_value(iport_ht, device_id);
if (!iport) {
return self->on_error(self, "Internal error: !iport %s", device_id);
}
if (iport->iwi) {
self->on_error(self, "%s already on :%d", device_id, iport->port);
return DL_SUCCESS;
}
char *device_name = iport->device_name;
int device_os_version = 0;
// connect to inspector
int wi_fd;
void *ssl_session = NULL;
bool is_sim = !strcmp(device_id, "SIMULATOR");
if (is_sim) {
// TODO launch webinspectord
// For now we'll assume Safari starts it for us.
//
// `launchctl list` shows:
// com.apple.iPhoneSimulator:com.apple.webinspectord
// so the launch is probably something like:
// xpc_connection_create[_mach_service](...webinspectord, ...)?
wi_fd = self->connect(self, my->sim_wi_socket_addr);
} else {
wi_fd = self->attach(self, device_id, NULL,
(device_name ? NULL : &device_name), &device_os_version, &ssl_session);
}
if (wi_fd < 0) {
self->remove_fd(self, iport->s_fd);
if (!is_sim) {
self->on_error(self, "Unable to attach %s inspector", device_id);
}
return DL_SUCCESS;
}
iport->device_name = (device_name ? device_name : strdup(device_id));
iport->device_os_version = device_os_version;
iwdp_iwi_t iwi = iwdp_iwi_new(!is_sim && device_os_version < 0xb0000,
self->is_debug);
iwi->iport = iport;
iport->iwi = iwi;
if (self->add_fd(self, wi_fd, ssl_session, iwi, false)) {
self->remove_fd(self, iport->s_fd);
return self->on_error(self, "add_fd wi_fd=%d failed", wi_fd);
}
iwi->wi_fd = wi_fd;
// start inspector
rpc_new_uuid(&iwi->connection_id);
rpc_t rpc = iwi->rpc;
if (rpc->send_reportIdentifier(rpc, iwi->connection_id)) {
self->remove_fd(self, iport->s_fd);
self->on_error(self, "Unable to report to inspector %s",
device_id);
return DL_SUCCESS;
}
iport->is_sticky = true;
return DL_SUCCESS;
}
dl_status iwdp_on_detach(dl_t dl, const char *device_id, int device_num) {
iwdp_idl_t idl = (iwdp_idl_t)dl->state;
iwdp_t self = idl->self;
iwdp_private_t my = self->private_state;
iwdp_iport_t iport = (iwdp_iport_t)ht_get_value(my->device_id_to_iport,
device_id);
if (iport && iport->s_fd > 0) {
self->remove_fd(self, iport->s_fd);
}
return IWDP_SUCCESS;
}
//
// socket I/O
//
iwdp_status iwdp_iport_accept(iwdp_t self, iwdp_iport_t iport, int ws_fd,
iwdp_iws_t *to_iws) {
iwdp_iws_t iws = iwdp_iws_new(self->is_debug);
iws->iport = iport;
iws->ws_fd = ws_fd;
rpc_new_uuid(&iws->ws_id);
ht_put(iport->ws_id_to_iws, iws->ws_id, iws);
*to_iws = iws;
return IWDP_SUCCESS;
}
iwdp_status iwdp_on_accept(iwdp_t self, int s_fd, void *value,
int fd, void **to_value) {
int type = ((iwdp_type_t)value)->type;
if (type == TYPE_IPORT) {
return iwdp_iport_accept(self, (iwdp_iport_t)value, fd,
(iwdp_iws_t*)to_value);
} else {
return self->on_error(self, "Unexpected accept type %d", type);
}
}
iwdp_status iwdp_on_recv(iwdp_t self, int fd, void *value,
const char *buf, ssize_t length) {
int type = ((iwdp_type_t)value)->type;
switch (type) {
case TYPE_IDL:
{
dl_t dl = ((iwdp_idl_t)value)->dl;
return dl->on_recv(dl, buf, length);
}
case TYPE_IWI:
{
wi_t wi = ((iwdp_iwi_t)value)->wi;
return wi->on_recv(wi, buf, length);
}
case TYPE_IWS:
{
ws_t ws = ((iwdp_iws_t)value)->ws;
return ws->on_recv(ws, buf, length);
}
case TYPE_IFS:
{
int ws_fd = ((iwdp_ifs_t)value)->iws->ws_fd;
iwdp_status ret = self->send(self, ws_fd, buf, length);
if (ret) {
self->remove_fd(self, ws_fd);
}
return ret;
}
default:
return self->on_error(self, "Unexpected recv type %d", type);
}
}
iwdp_status iwdp_iport_close(iwdp_t self, iwdp_iport_t iport) {
iwdp_private_t my = self->private_state;
// check pointer to this iport
const char *device_id = iport->device_id;
ht_t iport_ht = my->device_id_to_iport;
iwdp_iport_t old_iport = (iwdp_iport_t)ht_get_value(iport_ht, device_id);
if (old_iport != iport) {
return self->on_error(self, "Internal iport mismatch?");
}
// close clients
iwdp_iws_t *iwss = (iwdp_iws_t *)ht_values(iport->ws_id_to_iws);
iwdp_iws_t *iws;
for (iws = iwss; *iws; iws++) {
if ((*iws)->ws_fd > 0) {
self->remove_fd(self, (*iws)->ws_fd);
}
}
free(iwss);
ht_clear(iport->ws_id_to_iws);
// close iwi
iwdp_iwi_t iwi = iport->iwi;
if (iwi) {
iwdp_log_disconnect(iport);
iwi->iport = NULL;
iport->iwi = NULL;
if (iwi->wi_fd > 0) {
self->remove_fd(self, iwi->wi_fd);
}
}
if (iport->is_sticky) {
// keep iport so we can restore the port if this device is reattached
iport->s_fd = -1;
} else {
ht_remove(iport_ht, device_id);
iwdp_iport_free(iport);
}
return IWDP_SUCCESS;
}
iwdp_status iwdp_iws_close(iwdp_t self, iwdp_iws_t iws) {
// clear pointer to this iws
iwdp_ipage_t ipage = iws->ipage;
if (ipage) {
if (ipage->sender_id && ipage->iws == iws) {
iwdp_stop_devtools(ipage);
} // else internal error?
}
iwdp_iport_t iport = iws->iport;
if (iport) {
ht_t iws_ht = iport->ws_id_to_iws;
char *ws_id = iws->ws_id;
iwdp_iws_t iws2 = (iwdp_iws_t)ht_get_value(iws_ht, ws_id);
if (ws_id && iws2 == iws) {
ht_remove(iws_ht, ws_id);
} // else internal error?
}
iwdp_ifs_t ifs = iws->ifs;
if (ifs) {
ifs->iws = NULL;
if (ifs->fs_fd > 0) {
self->remove_fd(self, ifs->fs_fd);
} // else internal error?
}
iwdp_iws_free(iws);
return IWDP_SUCCESS;
}
iwdp_status iwdp_iwi_close(iwdp_t self, iwdp_iwi_t iwi) {
iwdp_iport_t iport = iwi->iport;
if (iport) {
iwdp_log_disconnect(iport);
// clear pointer to this iwi
if (iport->iwi) {
iport->iwi = NULL;
}
}
// free pages
ht_t ipage_ht = iwi->page_num_to_ipage;
iwdp_ipage_t *ipages = (iwdp_ipage_t *)ht_values(ipage_ht);
ht_clear(ipage_ht);
iwdp_ipage_t *ipp;
for (ipp = ipages; *ipp; ipp++) {
iwdp_ipage_free((iwdp_ipage_t)*ipp);
}
free(ipages);
iwdp_iwi_free(iwi);
// close browser listener, which will close all clients
if (iport && iport->s_fd > 0) {
self->remove_fd(self, iport->s_fd);
}
return IWDP_SUCCESS;
}
iwdp_status iwdp_ifs_close(iwdp_t self, iwdp_ifs_t ifs) {
iwdp_iws_t iws = ifs->iws;
// clear pointer to this ifs
if (iws && iws->ifs == ifs) {
iws->ifs = NULL;
}
iwdp_ifs_free(ifs);
// close client
if (iws && iws->ws_fd > 0) {
self->remove_fd(self, iws->ws_fd);
}
return IWDP_SUCCESS;
}
iwdp_status iwdp_idl_close(iwdp_t self, iwdp_idl_t idl) {
// TODO rm_fd all device_id_to_iport s_fds?!
return IWDP_SUCCESS;
}
iwdp_status iwdp_on_close(iwdp_t self, int fd, void *value, bool is_server) {
int type = ((iwdp_type_t)value)->type;
switch (type) {
case TYPE_IDL:
return iwdp_idl_close(self, (iwdp_idl_t)value);
case TYPE_IPORT:
return iwdp_iport_close(self, (iwdp_iport_t)value);
case TYPE_IWI:
return iwdp_iwi_close(self, (iwdp_iwi_t)value);
case TYPE_IWS:
return iwdp_iws_close(self, (iwdp_iws_t)value);
case TYPE_IFS:
return iwdp_ifs_close(self, (iwdp_ifs_t)value);
default:
return self->on_error(self, "Unknown close type %d", type);
}
}
//
// websocket
//
ws_status iwdp_send_data(ws_t ws, const char *data, size_t length) {
iwdp_iws_t iws = (iwdp_iws_t)ws->state;
iwdp_t self = iws->iport->self;
return (self->send(self, iws->ws_fd, data, length) ?
ws->on_error(ws, "Unable to send %zd bytes of data", length) :
WS_SUCCESS);
}
ws_status iwdp_send_http(ws_t ws, bool is_head, const char *status,
const char *resource, const char *content) {
char *ctype;
iwdp_get_content_type(resource, false, &ctype);
char *data;
if (asprintf(&data,
"HTTP/1.1 %s\r\n"
"Content-length: %zd\r\n"
"Connection: close\r\n"
"Access-Control-Allow-Origin: *\r\n"
"Access-Control-Allow-Methods: GET, HEAD"
"%s%s\r\n\r\n%s",
status, (content ? strlen(content) : 0),
(ctype ? "\r\nContent-Type: " : ""), (ctype ? ctype : ""),
(content && !is_head ? content : "")) < 0) {
return ws->on_error(ws, "asprintf failed");
}
free(ctype);
ws_status ret = ws->send_data(ws, data, strlen(data));
free(data);
return ret;
}
ws_status iwdp_on_list_request(ws_t ws, bool is_head, bool want_json,
const char *host) {
iwdp_iws_t iws = (iwdp_iws_t)ws->state;
iwdp_iport_t iport = iws->iport;
iwdp_t self = iport->self;
iwdp_private_t my = self->private_state;
char *content;
if (iport->device_id) {
const char *fe_url = my->frontend;
char *frontend_url = NULL;
if (fe_url && !strncasecmp(fe_url, "chrome-devtools://", 18)) {
// allow chrome-devtools links, even though Chrome's sandbox blocks them:
// Not allowed to load local resource: chrome-devtools://...
// Maybe a future Chrome flag (TBD?) will permit this.
frontend_url = strdup(fe_url);
} else if (fe_url) {
const char *fe_proto = strstr(fe_url, "://");
const char *fe_path = (fe_proto ? fe_proto + 3 : fe_url);
const char *fe_sep = strrchr(fe_path, '/');
const char *fe_file = (fe_sep ? (strlen(fe_sep) > 1 ? fe_sep + 1 : NULL) :
fe_path);
if (!fe_file) {
self->on_error(self, "Ignoring invalid frontend: %s\n", fe_url);
}
if (asprintf(&frontend_url, "/devtools/%s", fe_file) < 0) {
return self->on_error(self, "asprintf failed");
}
}
ht_t ipage_ht = (iport->iwi ? iport->iwi->page_num_to_ipage : NULL);
iwdp_ipage_t *ipages = (iwdp_ipage_t *)ht_values(ipage_ht);
content = iwdp_ipages_to_text(ipages, want_json,
iport->device_id, iport->device_name, frontend_url, host, iport->port);
free(ipages);
free(frontend_url);
} else {
iwdp_iport_t *iports = (iwdp_iport_t *)ht_values(my->device_id_to_iport);
content = iwdp_iports_to_text(iports, want_json, host);
free(iports);
}
ws_status ret = iwdp_send_http(ws, is_head, "200 OK",
(want_json ? ".json" : ".html"), content);
free(content);
return ret;
}
ws_status iwdp_on_not_found(ws_t ws, bool is_head, const char *resource,
const char *details) {
char *content;
if (asprintf(&content,
"<html><title>Error 404 (Not Found)</title>\n"
"<p><b>404.</b> <ins>That's an error.</ins>\n"
"<p>The requested URL <code>%s</code> was not found.\n"
"%s</html>", resource, (details ? details : "")) < 0) {
return ws->on_error(ws, "asprintf failed");
}
ws_status ret = iwdp_send_http(ws, is_head, "404 Not Found", ".html",
content);
free(content);
return ret;
}
ws_status iwdp_on_devtools_request(ws_t ws, const char *resource) {
iwdp_iws_t iws = (iwdp_iws_t)ws->state;
if (!resource || strncmp(resource, "/devtools/page/", 15)) {
return ws->on_error(ws, "Internal error: %s", resource);
}
// parse page_num
const char *s = resource + 15;
char *end = NULL;
int page_num = strtol(s, &end, 0);
if (*end != '\0' || *s == '\0') {
page_num = -1;
}
// find page
iwdp_iwi_t iwi = iws->iport->iwi;
iwdp_ipage_t p =
(iwi && page_num > 0 && page_num <= iwi->max_page_num ?
(iwdp_ipage_t)ht_get_value(iwi->page_num_to_ipage,
HT_KEY(page_num)) : NULL);
if (!p) {
return iwdp_on_not_found(ws, false, resource, "Unknown page id");
}
return iwdp_start_devtools(p, iws);
}
ws_status iwdp_get_frontend_path(const char *fe_path, const char *resource,
char **to_path) {
if (!to_path) {
return IWDP_ERROR;
}
*to_path = NULL;
// trim frontend "/qux/inspector.html" to "/qux/"
if (!fe_path) {
return IWDP_ERROR;
}
const char *fe_file = strrchr(fe_path, '/');
fe_file = (fe_file ? fe_file + 1 : NULL);
size_t fe_path_len = (fe_file ? (fe_file - fe_path) : 0);
// trim resource "/devtools/foo/bar.html?q" to "foo/bar.html"
// this might be too restrictive, but at least it's secure
if (!resource || strncmp(resource, "/devtools/", 10)) {
return IWDP_ERROR;
}
const char *res = resource + 10;
const char *res_tail = res - 1;
while (*++res_tail == '/') { // deny root via !fe_path_len && res[0]=='/'
}
char ch;
for (ch = *res_tail;
((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
(ch >= '0' && ch <= '9') || (ch && strchr("-./_", ch)));
ch = *++res_tail) {
}
size_t res_len = res_tail - res;
if (strnstr(res, "..", res_len)) {
return IWDP_ERROR;
}
if (!res_len && fe_file) {
res = fe_file;
res_len = strlen(fe_file);
}
// concat them into "/qux/foo/bar.html"
if (asprintf(to_path, "%.*s%.*s", (int)fe_path_len, fe_path, (int)res_len, res) < 0) {
return IWDP_ERROR;
}
return IWDP_SUCCESS;
}
ws_status iwdp_on_static_request_for_file(ws_t ws, bool is_head,
const char *resource, const char *fe_path, bool *to_keep_alive) {
iwdp_iws_t iws = (iwdp_iws_t)ws->state;
iwdp_t self = iws->iport->self;
// TODO if fe_path is "/blah/resources.pak#devtools.html", do something like:
// if not my->path2pos and exists "/blah/resources.pak":
// read pathToOffset from pak, e.g. [(22000,3500), (22001,5000), ...]
// if exists "/blah/resources.dat":
// read path2id from text file, e.g. "22000 devtools.html\n22001 ..."
// elif exists chrome binary: // ugly hack :(
// find '\0devtools.html\0' in binary
// read path2id from strings until a non-path, assume ids 22000-and-up
// join into my->path2pos, e.g. {'devtools.html':(3500,1500), ...}
// if my->path2pos:
// offset, length = my->path2pos[resource + 10]
// seek to offset in "/blah/resources.pak", read length bytes, ws->send
char *path;
iwdp_get_frontend_path(fe_path, resource, &path);
if (!path) {
return iwdp_send_http(ws, is_head, "403 Forbidden", ".txt", "Invalid path");
}
int fs_fd = open(path, O_RDONLY);
if (fs_fd < 0) {
// file doesn't exist. Provide help if this is a "*.js" with a matching
// "*.qrc", e.g. WebKit's qresource-compiled "InspectorBackendCommands.js"
bool is_qrc = false;
if (strlen(path) > 3 && !strcasecmp(path + strlen(path) - 3, ".js")) {
char *qrc_path;
if (asprintf(&qrc_path, "%.*sqrc", (int)(strlen(path) - 2), path) < 0) {
return self->on_error(self, "asprintf failed");
}
int qrc_fd = open(qrc_path, O_RDONLY);
free(qrc_path);
if (qrc_fd >= 0) {
is_qrc = true;
close(qrc_fd);
}
}
if (is_qrc) {
const char *fe_sep = strrchr(fe_path, '/');
size_t fe_path_len = (fe_sep ? (fe_sep - fe_path) : strlen(fe_path));
self->on_error(self, "Missing code-generated WebKit file:\n"
" %s\n"
"A matching \".qrc\" exists, so try generating the \".js\":\n"
" cd %.*s/..\n"
" mkdir -p tmp\n"
" ./CodeGeneratorInspector.py Inspector.json "
"--output_h_dir tmp --output_cpp_dir tmp\n"
" mv tmp/*.js %.*s\n", path, fe_path_len, fe_path,
fe_path_len, fe_path);
}
free(path);
return iwdp_on_not_found(ws, is_head, resource,
(is_qrc ? "Missing code-generated WebKit file" : NULL));
}
char *ctype = NULL;
iwdp_get_content_type(path, true, &ctype);
free(path);
struct stat fs_stat;
if (fstat(fs_fd, &fs_stat) || !(fs_stat.st_mode & S_IFREG)) {
free(ctype);
close(fs_fd);
return iwdp_send_http(ws, is_head, "403 Forbidden", ".txt", "Not a file");
}
size_t length = fs_stat.st_size;
char *data = NULL;
if (asprintf(&data,
"HTTP/1.1 200 OK\r\n"
"Content-length: %zd\r\n"
"Connection: close"
"%s%s\r\n\r\n",
length, (ctype ? "\r\nContent-Type: " : ""), (ctype ? ctype : "")) < 0) {
return self->on_error(self, "asprintf failed");
}
free(ctype);
ws_status ret = ws->send_data(ws, data, strlen(data));
free(data);
if (ret || is_head || !length) {
close(fs_fd);
return ret;
}
// bummer, can't self->add_fd this non-socket fd to selectable :(
size_t max_len = 4096;
size_t buf_len = (length > max_len ? max_len : length);
char *buf = (char *)calloc(buf_len, sizeof(char));
ssize_t sent_bytes = 0;
while (true) {
ssize_t read_bytes = read(fs_fd, buf, buf_len);
if (read_bytes <= 0) {
break;
}
if (ws->send_data(ws, buf, read_bytes)) {
break;
}
sent_bytes += read_bytes;
}
close(fs_fd);
return (sent_bytes == length ? WS_SUCCESS : WS_ERROR);
}
ws_status iwdp_on_static_request_for_http(ws_t ws, bool is_head,
const char *resource, bool *to_keep_alive) {
iwdp_iws_t iws = (iwdp_iws_t)ws->state;
iwdp_t self = iws->iport->self;
const char *fe_url = self->private_state->frontend;
if (!resource || !fe_url || strncasecmp(fe_url, "http://", 7)) {
return IWDP_ERROR; // internal error
}
const char *fe_host = fe_url + 7;
const char *fe_path = strchr(fe_host, '/');
if (!fe_path) {
return iwdp_send_http(ws, is_head, "500 Server Error", ".txt",
"Invalid frontend URL?");
}
char *path;
iwdp_get_frontend_path(fe_path, resource, &path);
if (!path) {
return iwdp_send_http(ws, is_head, "403 Forbidden", ".txt", "Invalid path");
}
const char *fe_port = strchr(fe_host, ':');
fe_port = (fe_port && fe_port <= fe_path ? fe_port :
NULL); // e.g. "http://foo.com/bar:x"
size_t fe_host_len = ((fe_port ? fe_port : fe_path) - fe_host);
char *host = strndup(fe_host, fe_host_len);
char *host_with_port;
char *port = NULL;
if (fe_port) {
port = strndup(fe_port, fe_path - fe_port);
}
if (asprintf(&host_with_port, "%s%s", host, port ? port : ":80") < 0) {
return self->on_error(self, "asprintf failed");
};
free(port);
int fs_fd = self->connect(self, host_with_port);
if (fs_fd < 0) {
char *error;
if (asprintf(&error, "Unable to connect to %s", host_with_port) < 0) {
return self->on_error(self, "asprintf failed");
}
free(host_with_port);
free(host);
free(path);
ws_status ret = iwdp_send_http(ws, is_head, "500 Server Error", ".txt",
error);
free(error);
return ret;
}
iwdp_ifs_t ifs = iwdp_ifs_new();
ifs->iws = iws;
ifs->fs_fd = fs_fd;
iws->ifs = ifs;
if (self->add_fd(self, fs_fd, NULL, ifs, false)) {
free(host_with_port);
free(host);
free(path);
return self->on_error(self, "Unable to add fd %d", fs_fd);
}
char *data;
if (asprintf(&data,
"%s %s HTTP/1.1\r\n"
"Host: %s\r\n"
"Connection: close\r\n" // keep-alive?
"Accept: */*\r\n"
"\r\n",
(is_head ? "HEAD" : "GET"), path, host) < 0) {