diff --git a/urlresolve.lua b/urlresolve.lua
new file mode 100644
index 0000000..1c78a61
--- /dev/null
+++ b/urlresolve.lua
@@ -0,0 +1,29 @@
+local t={}
+
+function t.github(reponame,fileaddr)
+    return "https://raw.githubusercontent.com/" .. reponame .. "/master/" .. fileaddr
+end
+function t.bitbucket(reponame,fileaddr)
+    return "https://bitbucket.org/" .. reponame .. "/raw/master/" .. fileaddr
+end
+function t.gitee(reponame,fileaddr)
+    return "https://gitee.com/" .. reponame .. "/raw/master/" .. fileaddr
+end
+function t.csdncode(reponame,fileaddr)
+    return "https://code.csdn.net/" .. reponame .. "/blob/master/" .. fileaddr
+end
+function t.cngit(reponame,fileaddr)
+    return "http://kiritow.com:3000/" .. reponame .. "/raw/master/" .. fileaddr
+end
+function t.codingnet(reponame,fileaddr)
+    local idx=string.find(x,"/")
+    if(idx~=nil) then
+        local user=string.sub(x,1,idx-1)
+        local repo=string.sub(x,idx+1)
+        return "https://coding.net/u/" .. user .. "/p/" .. repo .. "/git/raw/master/" .. fileaddr
+    else
+        error("Cannot resolve coding.net repository url.")
+    end
+end
+
+return t
\ No newline at end of file