import time import os import pcipywrap import json import BaseHTTPServer import sys from optparse import OptionParser class PcilibServerHandler(BaseHTTPServer.BaseHTTPRequestHandler): def __init__(s, pcilib, *args): s.pcilib = pcilib BaseHTTPServer.BaseHTTPRequestHandler.__init__(s, *args) def do_HEAD(s): s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() def do_GET(s): length = int(s.headers['Content-Length']) #deserialize input data data = json.loads(s.rfile.read(length).decode('utf-8')) if 'command' in data: command = data['command'] if(command == 'help'): s.help(data) #elif(command == 'open'): # #check required arguments # if not 'device' in data: # s.error('message doesnt contains "device" field, ' # 'which is required for "open" command', data) # return # #parse command arguments and convert them to string # device = str(data.get('device', None)) # model = data.get('model', None) # if not model is None: # model = str(model) # # try: # s.openPcilibInstance(device, model) # except Exception as e: # s.error(str(e), data) # return # # #Success! Create and send reply # s.send_response(200) # s.send_header('content-type', 'application/json') # s.end_headers() # out = dict() # out['status'] = 'ok' # s.wrapMessageAndSend(out, data) elif(command == 'get_registers_list'): #parse command arguments and convert them to string bank = data.get('bank', None) if not bank is None: bank = str(bank) registers = dict() try: registers = s.pcilib.get_registers_list(bank) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' out['registers'] = registers s.wrapMessageAndSend(out, data) elif(command == 'get_register_info'): #check required arguments if not 'reg' in data: s.error('message doesnt contains "reg" field, ' 'which is required for "get_register_info" command', data) return #parse command arguments and convert them to string reg = str(data.get('reg', None)) bank = data.get('bank', None) if not bank is None: bank = str(bank) register = dict() try: register = s.pcilib.get_register_info(reg, bank) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' out['register'] = register s.wrapMessageAndSend(out, data) elif(command == 'get_property_list'): #parse command arguments and convert them to string branch = data.get('branch', None) if not branch is None: branch = str(branch) properties = dict() try: properties = s.pcilib.get_property_list(branch) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' out['properties'] = properties s.wrapMessageAndSend(out, data) elif(command == 'read_register'): #check required arguments if not 'reg' in data: s.error('message doesnt contains "reg" field, ' 'which is required for "read_register" command', data) return #parse command arguments and convert them to string reg = str(data.get('reg', None)) bank = data.get('bank', None) if not bank is None: bank = str(bank) value = 0 try: value = s.pcilib.read_register(reg, bank) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' out['value'] = value s.wrapMessageAndSend(out, data) elif(command == 'write_register'): #check required arguments if not 'reg' in data: s.error('message doesnt contains "reg" field, ' 'which is required for "write_register" command', data) return if not 'value' in data: s.error('message doesnt contains "value" field, ' 'which is required for "write_register" command', data) return #parse command arguments and convert them to string reg = str(data.get('reg', None)) value = str(data.get('value', None)) bank = data.get('bank', None) if not bank is None: bank = str(bank) try: s.pcilib.write_register(value, reg, bank) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' s.wrapMessageAndSend(out, data) elif(command == 'get_property'): #check required arguments if not 'prop' in data: s.error('message doesnt contains "prop" field, ' 'which is required for "get_property" command', data) return #parse command arguments and convert them to string prop = str(data.get('prop', None)) value = 0 try: value = s.pcilib.get_property(prop) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' out['value'] = value s.wrapMessageAndSend(out, data) elif(command == 'set_property'): #check required arguments if not 'prop' in data: s.error('message doesnt contains "prop" field, ' 'which is required for "set_property" command', data) return if not 'value' in data: s.error('message doesnt contains "value" field, ' 'which is required for "set_property" command', data) return #parse command arguments and convert them to string prop = str(data.get('prop', None)) value = str(data.get('value', None)) try: s.pcilib.set_property(value, prop) except Exception as e: s.error(str(e), data) return #Success! Create and send reply s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'ok' s.wrapMessageAndSend(out, data) else: s.error('command "' + command + '" undefined', data) return else: s.error('message doesnt contains "command" field, which is required', data) return #print str(s.headers['content-type']) #print post_data['some'] """open device context """ def openPcilibInstance(s, device, model): s.pcilib = pcipywrap.create_pcilib_instance(device, model) """Send help message""" def help(s, received_message = None): s.send_response(200) s.send_header('content-type', 'application/json') s.end_headers() usage = str('Usage:\n' ' Server receive commands via http GET with json packet.\n' ' content-type should have value "application/json"\n' ' Server could handle only commands. to set command, you\n' ' should specify field "command" in packet with command name\n' ' List of commands:\n' '\n' ' command: help - Get help. This will return usage\n' '\n' ' command: open - Opens context of device. It will be reopened if already open.\n' ' required fields\n' ' device: - path to the device file [/dev/fpga0]\n' ' optional fields\n' ' model: - specifies the model of hardware, autodetected if doesnt exists\n' '\n' ' command: get_registers_list - Returns the list of registers provided by the hardware model.\n' ' optional fields\n' ' bank: - if set, only register within the specified bank will be returned\n' '\n' ' command: get_register_info - Returns the information about the specified register.\n' ' required fields\n' ' reg: - the name of the register\n' ' optional fields\n' ' bank: - if set, only register within the specified bank will be returned\n' '\n' ' command: get_property_list - Returns the list of properties available under the specified path.\n' ' optional fields\n' ' branch: - Path. If not set, will return the top-level properties\n' '\n' ' command: read_register - Reads the specified register.\n' ' required fields\n' ' reg: - the name of the register\n' ' optional fields\n' ' bank: - if set, only register within the specified bank will be processed\n' '\n' ' command: write_register - Writes to specified register.\n' ' required fields\n' ' reg: - the name of the register\n' ' value: - the register value to write. Should be int, float or string (with number)\n' ' optional fields\n' ' bank: - if set, only register within the specified bank will be processed\n' '\n' ' command: get_property - Reads / computes the property value.\n' ' required fields\n' ' prop: - full name including path\n' '\n' ' command: set_property - Writes the property value or executes the code associated with property.\n' ' required fields\n' ' prop: - full name including path\n' ' value: - the property value to write. Should be int, float or string (with number)\n' '\n') out = {'status': 'ok', 'usage' : usage} s.wrapMessageAndSend(out, received_message) """Send error message with text description""" def error(s, info, received_message = None): s.send_response(400) s.send_header('content-type', 'application/json') s.end_headers() out = dict() out['status'] = 'error' out['description'] = info out['note'] = 'send {"command" : "help"} to get help' s.wrapMessageAndSend(out, received_message) def wrapMessageAndSend(s, message, received_message = None): if not received_message is None: message['received_message'] = received_message s.wfile.write(json.dumps(message)) if __name__ == '__main__': #parce command line options parser = OptionParser() parser.add_option("-p", "--port", action="store", type="int", dest="port", default=9000, help="Set server port (9000)") parser.add_option("-d", "--device", action="store", type="string", dest="device", default=str('/dev/fpga0'), help="FPGA device (/dev/fpga0)") parser.add_option("-m", "--model", action="store", type="string", dest="model", default=None, help="Memory model (autodetected)") opts = parser.parse_args()[0] HOST_NAME = '' PORT_NUMBER = opts.port MODEL = opts.model DEVICE = opts.device #Set enviroment variables, if it not setted already if not 'APP_PATH' in os.environ: APP_PATH = '' file_dir = os.path.dirname(os.path.abspath(__file__)) APP_PATH = str(os.path.abspath(file_dir + '/../..')) os.environ["APP_PATH"] = APP_PATH if not 'PCILIB_MODEL_DIR' in os.environ: os.environ['PCILIB_MODEL_DIR'] = os.environ["APP_PATH"] + "/xml" if not 'LD_LIBRARY_PATH' in os.environ: os.environ['LD_LIBRARY_PATH'] = os.environ["APP_PATH"] + "/pcilib" #redirect logs to exeption pcipywrap.__redirect_logs_to_exeption() #start server pcilib_server = BaseHTTPServer.HTTPServer #pass Pcipywrap to to server handler lib = pcipywrap.Pcipywrap(DEVICE, MODEL) def handler(*args): PcilibServerHandler(lib, *args) httpd = pcilib_server((HOST_NAME, PORT_NUMBER), handler) print time.asctime(), "Server Starts - %s:%s" % (HOST_NAME, PORT_NUMBER) try: httpd.serve_forever() except KeyboardInterrupt: pass httpd.server_close() print time.asctime(), "Server Stops - %s:%s" % (HOST_NAME, PORT_NUMBER)