def __call__(self, *args):
args = self.lua.lua2python(args)
args_text = json.dumps(args, ensure_ascii=False, encoding="utf8")[1:-1]
func_text = json.dumps([self.source], ensure_ascii=False, encoding='utf8')[1:-1]
wrapper_script = """
(function(func_text){
try{
var func = eval("(" + func_text + ")");
return {
result: func(%(args)s),
error: false,
}
}
catch(e){
return {
error: true,
error_repr: e.toString(),
}
}
})(%(func_text)s)
""" % {"func_text": func_text, "args": args_text}
# print(wrapper_script)
res = self.tab.evaljs(wrapper_script)
if not isinstance(res, dict):
raise ScriptError("[lua] unknown error during JS function call: %r; %r" % (res, wrapper_script))
if res["error"]:
raise ScriptError("[lua] error during JS function call: %r" % (res.get("error_repr", "<unknown error>"),))
return res.get("result")
def set_result_header(self, name, value):
if not all([isinstance(h, basestring) for h in [name, value]]):
raise ScriptError(
"splash:set_result_header() arguments must be strings")
try:
name = name.decode('utf-8').encode('ascii')
value = value.decode('utf-8').encode('ascii')
except UnicodeEncodeError:
raise ScriptError(
"splash:set_result_header() arguments must be ascii")
header = (name, value)
self._result_headers.append(header)
def start(self, lua_source, sandboxed, lua_package_path,
lua_sandbox_allowed_modules):
self.log(lua_source)
self.sandboxed = sandboxed
self.lua = SplashLuaRuntime(
sandboxed=sandboxed,
lua_package_path=lua_package_path,
lua_sandbox_allowed_modules=lua_sandbox_allowed_modules)
self.splash = Splash(self.lua, self.tab, self.render_options)
self.runner = SplashScriptRunner(
lua=self.lua,
splash=self.splash,
log=self.log,
sandboxed=sandboxed,
)
try:
main_coro = self.get_main(lua_source)
except (ValueError, lupa.LuaSyntaxError, lupa.LuaError) as e:
raise ScriptError("lua_source: " + repr(e))
self.runner.start(
main_coro=main_coro,
return_result=self.return_result,
return_error=self.return_error,
)
def autoload(self, source_or_url=None, source=None, url=None):
if len([a
for a in [source_or_url, source, url] if a is not None]) != 1:
raise ScriptError("splash:autoload requires a single argument")
if source_or_url is not None:
source_or_url = source_or_url.strip()
if source_or_url.startswith(("http://", "https://")):
source, url = None, source_or_url
else:
source, url = source_or_url, None
if source is not None:
# load source directly
self.tab.autoload(source)
return ImmediateResult(True)
else:
# load JS from a remote resource
cmd_id = next(self._command_ids)
def callback(reply):
if reply.error():
reason = REQUEST_ERRORS_SHORT.get(reply.error(), '?')
self._return(cmd_id, None, reason)
else:
source = bytes(reply.readAll())
self.tab.autoload(source)
self._return(cmd_id, True)
return AsyncBrowserCommand(cmd_id, "http_get",
dict(url=url, callback=callback))
def go(self, url, baseurl=None, headers=None):
if url is None:
raise ScriptError("'url' is required for splash:go")
if self.tab.web_page.navigation_locked:
return ImmediateResult((None, "navigation_locked"))
cmd_id = next(self._command_ids)
def success():
try:
code = self.tab.last_http_status()
if code and 400 <= code < 600:
# return HTTP errors as errors
self._return(cmd_id, None, "http%d" % code)
else:
self._return(cmd_id, True)
except Exception as e:
self._return(cmd_id, None, "internal_error")
def error(error_info):
self._return(cmd_id, None, self._error_info_to_lua(error_info))
return AsyncBrowserCommand(
cmd_id, "go",
dict(
url=url,
baseurl=baseurl,
callback=success,
errback=error,
headers=self.lua.lua2python(headers, max_depth=3),
))
def set_resource_timeout(self, timeout):
if timeout is None:
timeout = 0
timeout = float(timeout)
if timeout < 0:
raise ScriptError("splash.resource_timeout can't be negative")
self.tab.set_resource_timeout(timeout)
def wrapper(self, *args, **kwargs):
try:
return meth(self, *args, **kwargs)
except ScriptError as e:
self._exceptions.append(e)
raise
except BaseException as e:
self._exceptions.append(ScriptError(e))
raise
def http_get(self, url, headers=None, follow_redirects=True):
if url is None:
raise ScriptError("'url' is required for splash:http_get")
cmd_id = next(self._command_ids)
def callback(reply):
reply_har = reply2har(reply, include_content=True, binary_content=True)
self._return(cmd_id, self.lua.python2lua(reply_har))
return AsyncBrowserCommand(cmd_id, "http_get", dict(
url=url,
callback=callback,
headers=self.lua.lua2python(headers, max_depth=3),
follow_redirects=follow_redirects,
))
def set_user_agent(self, value):
if not isinstance(value, basestring):
raise ScriptError(
"splash:set_user_agent() argument must be a string")
self.tab.set_user_agent(value)
def set_result_content_type(self, content_type):
if not isinstance(content_type, basestring):
raise ScriptError(
"splash:set_result_content_type() argument must be a string")
self._result_content_type = content_type
def set_timeout(self, timeout):
timeout = float(timeout)
if timeout < 0:
raise ScriptError("request:set_timeout() argument can't be < 0")
self.request.timeout = timeout
def set_result_status_code(self, code):
if not isinstance(code, int) or not (200 <= code <= 999):
raise ScriptError(
"splash:set_result_status_code() argument must be a number 200 <= code <= 999"
)
self._result_status_code = code
