def run(*path, **query):
if len(path) == 0:
tangelo.http_status(400, "Missing Path")
return {"error": "missing path to config file"}
required = query.get("required") is not None
url = "/" + "/".join(path)
content = analyze_url(url).content
if content is None or content.type not in [Content.File, Content.NotFound]:
tangelo.http_status(400, "Illegal Path")
return {"error": "illegal web path (path does not point to a config file)"}
elif content.type == Content.NotFound:
if required:
return {"error": "File not found",
"file": url}
else:
return {"result": {}}
try:
config = tangelo.util.yaml_safe_load(content.path, dict)
except IOError:
tangelo.http_status(404)
return {"error": "could not open file at %s" % (url)}
except TypeError:
tangelo.http_status(400, "Not An Associative Array")
return {"error": "file at %s did not contain a top-level associative array" % (url)}
except ValueError as e:
tangelo.http_status(400, "YAML Error")
return {"error": "could not parse YAML from file at %s: %s" % (url, e.message)}
return {"result": config}
def post(*pargs, **query):
args = query.get("args", "")
timeout = float(query.get("timeout", 0))
if len(pargs) == 0:
tangelo.http_status(400, "Required Argument Missing")
return {"error": "No program path was specified"}
program_url = "/" + "/".join(pargs)
content = analyze_url(program_url).content
if content is None or content.type != Content.File:
tangelo.http_status(404, "Not Found")
return {"error": "Could not find a script at %s" % (program_url)}
program = content.path
# Check the user arguments.
userargs = args.split()
if "--port" in userargs:
tangelo.http_status(400, "Illegal Argument")
return {"error": "You may not specify '--port' among the arguments passed in 'args'"}
# Obtain an available port.
port = tangelo.util.get_free_port()
# Generate a unique key.
key = tangelo.util.generate_key(processes.keys())
# Detect http vs. https
scheme = "ws"
ssl_key = cherrypy.config.get("server.ssl_private_key")
ssl_cert = cherrypy.config.get("server.ssl_certificate")
# Generate command line.
cmdline = [vtkpython, weblauncher, program, "--port", str(port)] + userargs
if ssl_key and ssl_cert:
scheme = "wss"
cmdline.extend(["--sslKey", ssl_key, "--sslCert", ssl_cert])
# Launch the requested process.
tangelo.log_info("VTKWEB", "Starting process: %s" % (" ".join(cmdline)))
try:
process = subprocess.Popen(cmdline,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
except (OSError, IOError) as e:
tangelo.log_warning("VTKWEB", "Error: could not launch VTKWeb process")
return {"error": e.strerror}
# Capture the new process's stdout and stderr streams in
# non-blocking readers.
stdout = tangelo.util.NonBlockingReader(process.stdout)
stderr = tangelo.util.NonBlockingReader(process.stderr)
# Read from stdout to look for the signal that the process has
# started properly.
class FactoryStarted:
pass
class Failed:
pass
class Timeout:
pass
signal = "Starting factory"
if timeout <= 0:
timeout = 10
sleeptime = 0.5
wait = 0
saved_lines = []
try:
while True:
lines = stdout.readlines()
saved_lines += lines
for line in lines:
if line == "":
# This indicates that stdout has closed without
# starting the process.
raise Failed()
elif signal in line:
# This means that the server has started.
raise FactoryStarted()
# If neither failure nor success occurred in the last block
# of lines from stdout, either time out, or try again after
# a short delay.
if wait >= timeout:
raise Timeout()
wait += sleeptime
time.sleep(sleeptime)
except Timeout:
tangelo.http_status(524, "Timeout")
return {"error": "Process startup timed out"}
except Failed:
tangelo.http_status(500)
return {"error": "Process did not start up properly",
"stdout": saved_lines,
"stderr": stderr.readlines()}
except FactoryStarted:
stdout.pushlines(saved_lines)
# Create a websocket handler path dedicated to this process.
host = "localhost" if cherrypy.server.socket_host == "0.0.0.0" else cherrypy.server.socket_host
tangelo.websocket.mount(key, WebSocketRelay(host, port, key), "wamp")
# Log the new process in the process table, including non-blocking
# stdout and stderr readers.
processes[key] = {"port": port,
"process": process,
"stdout": stdout,
"stderr": stderr}
# Form the websocket URL from the hostname/port used in the
# request, and the newly generated key.
url = "%s://%s/ws/%s/ws" % (scheme, cherrypy.request.base.split("//")[1], key)
return {"key": key,
"url": url}
def analysis_dict(base, url=None):
if url is None:
url = base
base = "/analyze-url/"
return eval(str(analyze_url("%s%s" % (base, url))))
def post(*pargs, **query):
args = query.get("args", "")
timeout = float(query.get("timeout", 0))
processes = tangelo.plugin_store()["processes"]
if len(pargs) == 0:
tangelo.http_status(400, "Required Argument Missing")
return {"error": "No program path was specified"}
program_url = "/" + "/".join(pargs)
content = analyze_url(program_url).content
if content is None or content.type != Content.File:
tangelo.http_status(404, "Not Found")
return {"error": "Could not find a script at %s" % (program_url)}
elif content.path is None:
tangelo.http_status(403, "Restricted")
return {"error": "The script at %s is access-restricted"}
program = content.path
# Check the user arguments.
userargs = args.split()
if "--port" in userargs:
tangelo.http_status(400, "Illegal Argument")
return {"error": "You may not specify '--port' among the arguments passed in 'args'"}
# Obtain an available port.
port = tangelo.util.get_free_port()
# Generate a unique key.
key = tangelo.util.generate_key(processes.keys())
# Detect http vs. https
scheme = "ws"
ssl_key = cherrypy.config.get("server.ssl_private_key")
ssl_cert = cherrypy.config.get("server.ssl_certificate")
# Generate command line.
cmdline = [vtkpython, weblauncher, program, "--port", str(port)] + userargs
if ssl_key and ssl_cert:
scheme = "wss"
cmdline.extend(["--sslKey", ssl_key, "--sslCert", ssl_cert])
# Launch the requested process.
tangelo.log_info("VTKWEB", "Starting process: %s" % (" ".join(cmdline)))
try:
process = subprocess.Popen(cmdline,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
except (OSError, IOError) as e:
tangelo.log_warning("VTKWEB", "Error: could not launch VTKWeb process")
return {"error": e.strerror}
# Capture the new process's stdout and stderr streams in
# non-blocking readers.
stdout = tangelo.util.NonBlockingReader(process.stdout)
stderr = tangelo.util.NonBlockingReader(process.stderr)
# Read from stdout to look for the signal that the process has
# started properly.
class FactoryStarted:
pass
class Failed:
pass
class Timeout:
pass
signal = "Starting factory"
if timeout <= 0:
timeout = 10
sleeptime = 0.5
wait = 0
saved_lines = []
try:
while True:
lines = stdout.readlines()
saved_lines += lines
for line in lines:
if line == "":
# This indicates that stdout has closed without
# starting the process.
raise Failed()
elif signal in line:
# This means that the server has started.
raise FactoryStarted()
# If neither failure nor success occurred in the last block
# of lines from stdout, either time out, or try again after
# a short delay.
if wait >= timeout:
raise Timeout()
wait += sleeptime
time.sleep(sleeptime)
except Timeout:
tangelo.http_status(524, "Timeout")
return {"error": "Process startup timed out"}
except Failed:
tangelo.http_status(500)
return {"error": "Process did not start up properly",
"stdout": saved_lines,
"stderr": stderr.readlines()}
except FactoryStarted:
stdout.pushlines(saved_lines)
# Create a websocket handler path dedicated to this process.
host = "localhost" if cherrypy.server.socket_host == "0.0.0.0" else cherrypy.server.socket_host
tangelo.websocket.mount(key, WebSocketRelay(host, port, key), "wamp")
# Log the new process in the process table, including non-blocking
# stdout and stderr readers.
processes[key] = {"port": port,
"process": process,
"stdout": stdout,
"stderr": stderr}
# Form the websocket URL from the hostname/port used in the
# request, and the newly generated key.
url = "%s://%s/ws/%s/ws" % (scheme, cherrypy.request.base.split("//")[1], key)
return {"key": key,
"url": url}
