Initial commit

flaskcache.py

@@ -0,0 +1,38 @@
+from time import time
+from threading import Lock
+
+class FlaskCache:
+    def __init__(self, timeout=20):
+        self.timeout = timeout
+        self.cache   = {}
+        self.lock    = {}
+
+    def genpage(self, pagefunc, *args):
+        page = {}
+        try:
+            page["page"]   = pagefunc(*args)
+            page["code"] = 200
+        except Exception as e:
+            page["page"]   = "ERROR\n"
+            page["code"] = 500
+        page["time"] = time()
+        return(page)
+
+    def cachetime(self, pagename):
+        try:
+            delta = self.cache[pagename]["time"] + self.timeout - time()
+        except Exception as e:
+            delta = -1
+        return(delta)
+
+    def getpage(self, pagename, pagefunc, *args):
+        if pagename not in self.cache:
+            self.cache[pagename] = {}
+        if pagename not in self.lock:
+            self.lock[pagename] = Lock()
+        if (self.cachetime(pagename) <= 0):
+            self.lock[pagename].acquire()
+            if (self.cachetime(pagename) <= 0):
+                self.cache[pagename] = self.genpage(pagefunc, *args)
+            self.lock[pagename].release()
+        return(self.cache[pagename]["page"], self.cache[pagename]["code"])