1 <?xml version='1.0' encoding='utf-8'?>

     2 <PyFile xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema">

     3   <variables>

     4     <variable name="FileNotify" type="HMI_INT"/>

     5     <variable name="CurrentPath" type="HMI_STRING" initial="..."/>

     6     <variable name="FileName" type="HMI_STRING"/>

     7   </variables>

     8   <globals>

     9     <xhtml:p><![CDATA[

    10 from twisted.web.resource import Resource

    11 from os import getcwd, listdir

    12 from os.path import dirname, isfile, join

    13 import collections, json

    14 

    15 

    16 class FilesJsonResource(Resource):

    17     image_cache = {}

    18 

    19     def render_GET(self, request):

    20         request.setHeader('content-type', 'image/png')

    21         img_name = request.args[b'name'][0].decode('utf-8')

    22         p = getcwd()  + '/' + img_name

    23         if p not in self.image_cache:

    24             with open(p, 'rb') as image_file:

    25                 img_bytes = image_file.read()

    26                 self.image_cache[p] = img_bytes

    27         else:

    28             img_bytes = self.image_cache[p]

    29         return img_bytes

    30 

    31 

    32     def render_POST(self, request):

    33         newstr = request.content.getvalue()

    34         newdata = json.loads(newstr)

    35         args = newdata['args']

    36         range_feedback = newdata['range']

    37         slider_position = newdata['position']

    38         visible = newdata['visible']

    39         extra = newdata['extra']

    40         options = newdata['options']

    41 

    42         path = PLCGlobals.CurrentPath

    43         if path == '...':

    44             PLCGlobals.CurrentPath = path = getcwd()

    45 

    46         if len(options) == 1 :

    47             action, = options

    48             if action == 'action_reset':

    49                 PLCGlobals.CurrentPath = path = getcwd()

    50         elif len(options) == 2 :

    51             action, sent_path = options

    52             if action == 'onClick[acknowledge]':

    53                 if sent_path.endswith('.csv'):

    54                     PLCGlobals.FileName = sent_path

    55                 else:

    56                     PLCGlobals.CurrentPath = path = sent_path

    57 

    58         ld = listdir(path)

    59         ld.sort()

    60 

    61         if path != '/':

    62             FileList = [

    63                 {

    64                     'name': '..',

    65                     'path': dirname(path),

    66                     'type': 'folder',

    67                     'status': 'active',

    68                     'thumbnail': '/files?name=folder.png'

    69                 }

    70             ]

    71         else:

    72             FileList = []

    73 

    74         FileList.extend([

    75             {

    76                 'name': f,

    77                 'path': join(path, f),

    78                 'type': 'folder',

    79                 'status': 'active',

    80                 'thumbnail': '/files?name=folder.png'

    81             }

    82             for f in ld

    83             if not (isfile(join(path, f)) 

    84             or f.startswith("."))

    85         ])

    86         FileList.extend([

    87             {

    88                 'name': f,

    89                 'path': join(path, f),

    90                 'type': 'file',

    91                 'status': 'active',

    92                 'thumbnail': '/files?name=file.png'

    93             }

    94             for f in ld 

    95             if isfile(join(path, f)) 

    96             and f.endswith(".csv")

    97         ])

    98 

    99         answer = self.renderTable(

   100             FileList, range_feedback, slider_position, visible, extra

   101         )

   102         janswer = json.dumps(answer)

   103         return janswer.encode()

   104 

   105     def renderTable(self, FileList, old_range, old_position, visible, extra):

   106         if len(extra) > 0 and extra[0] != "":

   107             fFiles = [fl for fl in FileList if extra[0] in fl]

   108         else:

   109             fFiles = FileList[:]

   110         new_range = len(fFiles)

   111         delta = new_range - visible

   112         new_position = 0 if delta <= 0 else delta if old_position > delta else old_position

   113         new_visible = new_range if delta <= 0 else visible

   114 

   115         visible_files = []

   116         for desc in fFiles[new_position:new_position + new_visible]:

   117             visible_files.append(desc)

   118 

   119         return new_range, new_position, visible_files

   120 

   121 

   122 ]]></xhtml:p>

   123   </globals>

   124   <init>

   125     <xhtml:p><![CDATA[

   126 ]]></xhtml:p>

   127   </init>

   128   <cleanup>

   129     <xhtml:p><![CDATA[

   130 ]]></xhtml:p>

   131   </cleanup>

   132   <start>

   133     <xhtml:p><![CDATA[

   134 

   135 AddPathToSVGHMIServers(b"files", FilesJsonResource)

   136 

   137 

   138 ]]></xhtml:p>

   139   </start>

   140   <stop>

   141     <xhtml:p><![CDATA[

   142 ]]></xhtml:p>

   143   </stop>

   144 </PyFile>