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jaisingh/fcgi.go

Created January 14, 2015 18:30
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fcgi.go
package main
import (
"fmt"
"io"
"log"
"net/http"
"net/http/fcgi"
"os"
"runtime"
)
var app_addr string
func init() {
runtime.GOMAXPROCS(runtime.NumCPU())
app_addr = os.Getenv("APP_ADDR") // e.g. "0.0.0.0:8080" or ""
}
func ServeHTTP(w http.ResponseWriter, r *http.Request) {
headers := w.Header()
headers.Add("Content-Type", "text/html")
io.WriteString(w, "<html><head></head><body><p>Hello world from Go!</p><table>")
io.WriteString(w, fmt.Sprintf("<tr><td>Method</td><td>%s</td></tr>", r.Method))
io.WriteString(w, fmt.Sprintf("<tr><td>URL</td><td>%s</td></tr>", r.URL))
io.WriteString(w, fmt.Sprintf("<tr><td>URL.Path</td><td>%s</td></tr>", r.URL.Path))
io.WriteString(w, fmt.Sprintf("<tr><td>Proto</td><td>%s</td></tr>", r.Proto))
io.WriteString(w, fmt.Sprintf("<tr><td>Host</td><td>%s</td></tr>", r.Host))
io.WriteString(w, fmt.Sprintf("<tr><td>RemoteAddr</td><td>%s</td></tr>", r.RemoteAddr))
io.WriteString(w, fmt.Sprintf("<tr><td>RequestURI</td><td>%s</td></tr>", r.RequestURI))
io.WriteString(w, fmt.Sprintf("<tr><td>Header</td><td>%s</td></tr>", r.Header))
io.WriteString(w, fmt.Sprintf("<tr><td>Body</td><td>%s</td></tr>", r.Body))
io.WriteString(w, "</table></body></html>")
}
func main() {
http.HandleFunc("/", ServeHTTP)
var err error
if app_addr != "" { // Run as a local web server
err = http.ListenAndServe(app_addr, nil)
} else { // Run as FCGI via standard I/O
err = fcgi.Serve(nil, nil)
}
if err != nil {
log.Fatal(err)
}
}
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