X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/dd85af1b610b7f55bbfb2940a4325337291372ee..158628553f39cf4508a54021af71bc4836e893e8:/utils/cron_ipanalyse.py

diff --git a/utils/cron_ipanalyse.py b/utils/cron_ipanalyse.py
index 2d0738af..aba5e510 100755
--- a/utils/cron_ipanalyse.py
+++ b/utils/cron_ipanalyse.py
@@ -84,11 +84,11 @@ class LogEntry:
             if qp[0] == 'OPTIONS':
                 self.request = None
             else:
-                if qp[1].startswith('/search'):
+                if '/search' in qp[1]:
                     self.request = 'S'
-                elif qp[1].startswith('/reverse'):
+                elif '/reverse' in qp[1]:
                     self.request = 'R'
-                elif qp[1].startswith('/details'):
+                elif '/details' in qp[1]:
                     self.request = 'D'
                 else:
                     self.request = None
@@ -124,28 +124,72 @@ class LogFile:
         return LogEntry.get_log_time(l) if l is not None else None
 
     def seek_to_date(self, target):
-        date1 = self.seek_next(0)
-        if date1 > target:
+        # start position for binary search
+        fromseek = 0
+        fromdate = self.seek_next(0)
+        if fromdate > target:
+            return True
+        # end position for binary search
+        toseek = -100
+        while -toseek < self.len:
+            todate = self.seek_next(self.len + toseek)
+            if todate is not None:
+                break
+            toseek -= 100
+        if todate is None or todate < target:
             return False
-        curseek = 2*1024*1024
-        curdate = self.seek_next(curseek)
-        if curdate is None:
-            raise RuntimeError("Cannot seek to %d" % curseek)
-        while target < curdate or (target - curdate).total_seconds() > 1:
-            bps = curseek / ((curdate - date1).total_seconds())
-            curseek += (target - curdate).total_seconds() * bps
-            if curseek < 0:
-                curseek = 0
-            elif curseek > self.len:
-                curseek = self.len - bps
-            curdate = self.seek_next(curseek)
-            if curdate is None:
-                raise RuntimeError("Cannot see to %d" % curseek)
-        return True
+        toseek = self.len + toseek
+
+
+        while True:
+            bps = (toseek - fromseek) / (todate - fromdate).total_seconds()
+            newseek = fromseek + int((target - fromdate).total_seconds() * bps)
+            newdate = self.seek_next(newseek)
+            if newdate is None:
+                return False;
+            error = abs((target - newdate).total_seconds())
+            if error < 1:
+                return True
+            if newdate > target:
+                toseek = newseek
+                todate = newdate
+                oldfromseek = fromseek
+                fromseek = toseek - error * bps
+                while True:
+                    if fromseek <= oldfromseek:
+                        fromseek = oldfromseek
+                        fromdate = self.seek_next(fromseek)
+                        break
+                    fromdate = self.seek_next(fromseek)
+                    if fromdate < target:
+                        break;
+                    bps *=2
+                    fromseek -= error * bps
+            else:
+                fromseek = newseek
+                fromdate = newdate
+                oldtoseek = toseek
+                toseek = fromseek + error * bps
+                while True:
+                    if toseek > oldtoseek:
+                        toseek = oldtoseek
+                        todate = self.seek_next(toseek)
+                        break
+                    todate = self.seek_next(toseek)
+                    if todate > target:
+                        break
+                    bps *=2
+                    toseek += error * bps
+            if toseek - fromseek < 500:
+                return True
+
 
     def loglines(self):
         for l in self.fd:
-            yield LogEntry(l)
+            try:
+                yield LogEntry(l)
+            except ValueError:
+                pass # ignore invalid lines
 
 class BlockList: