diff options
Diffstat (limited to 'fg21sim/webui/handlers')
| -rw-r--r-- | fg21sim/webui/handlers/products.py | 62 |
1 files changed, 59 insertions, 3 deletions
diff --git a/fg21sim/webui/handlers/products.py b/fg21sim/webui/handlers/products.py index ffb27bb..eb6c0c9 100644 --- a/fg21sim/webui/handlers/products.py +++ b/fg21sim/webui/handlers/products.py @@ -11,6 +11,7 @@ import logging import shutil import tornado.ioloop +import tornado.process from tornado.escape import json_decode, json_encode from .base import BaseRequestHandler @@ -44,17 +45,18 @@ class ProductsAJAXHandler(BaseRequestHandler): - get: Get the current products manifest - which: Locate the command/program (check whether the command/program can be found in PATH and is executable) - - download: TODO - - open: TODO + - download: Download the specified product (HEALPix map / HPX image) + - open: Open the HPX image of a specified product using a sub-process + NOTE: Only allowed when accessing from the localhost """ action = self.get_argument("action", "get") if action == "get": # Get current products manifest + success = True response = { "manifest": self.products.manifest, "localhost": self.from_localhost, } - success = True elif action == "which": # Locate (and check) the command/program cmd = json_decode(self.get_argument("cmd")) @@ -68,6 +70,18 @@ class ProductsAJAXHandler(BaseRequestHandler): else: success = False reason = "Cannot locate the executable for: {0}".format(cmd) + elif action == "open": + # Open the HPX image of a specified product using a sub-process + comp_id = json_decode(self.get_argument("compID")) + freq_id = json_decode(self.get_argument("freqID")) + viewer = json_decode(self.get_argument("viewer")) + pid, error = self._open_hpx(comp_id, freq_id, viewer) + if pid is not None: + success = True + response = {"pid": pid} + else: + success = False + reason = error else: # ERROR: bad action success = False @@ -212,3 +226,45 @@ class ProductsAJAXHandler(BaseRequestHandler): except IOError as e: error = str(e) return (success, error) + + def _open_hpx(self, comp_id, freq_id, viewer): + """ + Open the HPX image of a specified product using a sub-process + + NOTE + ---- + Only allowed when accessing from the localhost + + Parameters + ---------- + comp_id : str + ID of the component whose product will be checksum'ed + freq_id : int + The frequency ID of the specific product within the component. + viewer : str + The executable name or path to the FITS viewer. + + Returns + ------- + pid : int + ID of the sub process which opened the HPX image. + ``None`` if failed to open the image. + error : str + If failed, this ``error`` saves the details, otherwise, ``None``. + """ + pid = None + error = None + if self.from_localhost: + try: + filepath = self.products.get_product_abspath( + comp_id, freq_id, ptype="hpx") + cmd = [viewer, filepath] + p = tornado.process.Subprocess(cmd) + pid = p.pid + logger.info("(PID: {0}) ".format(pid) + + "Opened HPX image: {0}".format(" ".join(cmd))) + except (ValueError, KeyError) as e: + error = str(e) + else: + error = "Action 'open' only allowed from localhost" + return (pid, error) |