web.go was just using the unseeded rand.Intn(), which generates the same random numbers each time. Now it creates its own generator with the current time as a seed.

Michael Hoisie · Michael Hoisie · commit e35baf08b683 · 2010-01-04T15:56:17.000-08:00
diff --git a/web.go b/web.go
@@ -14,6 +14,8 @@ import (
     "time"
 )
 
+var rgen = rand.New( rand.NewSource( time.Nanoseconds() ) )
+
 type Conn interface {
     StartResponse(status int)
     SetHeader(hdr string, val string, unique bool)
@@ -64,7 +66,7 @@ func randomString(length int) string {
     var res bytes.Buffer
 
     for i := 0; i < length; i++ {
-        rnd := rand.Intn(len(pop))
+        rnd := rgen.Intn(len(pop))
         res.WriteByte(pop[rnd])
     }
 

Original file line number	Diff line number	Diff line change
`@@ -14,6 +14,8 @@ import (`
`14`	`14`	`"time"`
`15`	`15`	`)`
`16`	`16`
	`17`	`+var rgen = rand.New( rand.NewSource( time.Nanoseconds() ) )`
	`18`	`+`
`17`	`19`	`type Conn interface {`
`18`	`20`	`StartResponse(status int)`
`19`	`21`	`SetHeader(hdr string, val string, unique bool)`
`@@ -64,7 +66,7 @@ func randomString(length int) string {`
`64`	`66`	`var res bytes.Buffer`
`65`	`67`
`66`	`68`	`for i := 0; i < length; i++ {`
`67`		`- rnd := rand.Intn(len(pop))`
	`69`	`+ rnd := rgen.Intn(len(pop))`
`68`	`70`	`res.WriteByte(pop[rnd])`
`69`	`71`	`}`
`70`	`72`