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tmplp.go
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tmplp.go
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//
// Go-FTL
//
// Copyright (C) Philip Schlump, 2014-2017
//
package tmplp
import (
"bufio"
"bytes"
"fmt"
"net"
"net/http"
"os"
"path/filepath"
"strconv"
"strings"
"text/template"
"time"
"github.com/pschlump/Go-FTL/server/goftlmux" //
ms "github.com/pschlump/templatestrings" //
)
// Modifed from: "encoding/json"
func GenDataFromReq(rw *goftlmux.MidBuffer, req *http.Request) (data map[string]string) {
data = make(map[string]string)
// process/pick from req what to allow for template stubstitution
data["IP"] = GetRemoteIP(req)
data["URI"] = req.RequestURI
data["delta_t"] = time.Since(rw.StartTime).String() // Very slow - should bind this into a function iinstead
data["host"] = req.Host
data["ERROR"] = fmt.Sprintf("%s", rw.Error)
data["method"] = req.Method
data["now"] = time.Now().Format(time.RFC3339Nano) // Very slow - should bind this into a function iinstead
data["path"] = req.URL.Path
data["port"] = GetPort(req)
data["query"] = req.URL.RawQuery
data["scheme"] = func() (rv string) {
rv = "http"
if req.TLS != nil {
rv = "https"
}
return
}()
data["start_time"] = rw.StartTime.Format(time.RFC3339Nano) // Very slow - should bind this into a function instead
data["status_code"] = strconv.Itoa(rw.StatusCode)
data["StatusCode"] = data["status_code"]
data["StatusText"] = http.StatusText(rw.StatusCode) // convert status to name
// xyzzy - add config
return
}
func TemplateProcess(tmpl string, rw *goftlmux.MidBuffer, req *http.Request, data map[string]string) (rv string) {
if data == nil {
data = make(map[string]string)
}
// process/pick from req what to allow for template stubstitution
data["IP"] = GetRemoteIP(req)
data["URI"] = req.RequestURI
data["delta_t"] = time.Since(rw.StartTime).String() // Very slow - should bind this into a function iinstead
data["host"] = req.Host
data["ERROR"] = fmt.Sprintf("%s", rw.Error)
data["method"] = req.Method
data["now"] = time.Now().Format(time.RFC3339Nano) // Very slow - should bind this into a function iinstead
data["path"] = req.URL.Path
data["port"] = GetPort(req)
data["query"] = req.URL.RawQuery
data["scheme"] = func() (rv string) {
rv = "http"
if req.TLS != nil {
rv = "https"
}
return
}()
data["start_time"] = rw.StartTime.Format(time.RFC3339Nano) // Very slow - should bind this into a function instead
data["status_code"] = strconv.Itoa(rw.StatusCode)
data["StatusCode"] = data["status_code"]
data["StatusText"] = http.StatusText(rw.StatusCode) // convert status to name
// xyzzy - add config
rv = ExecuteATemplate(tmpl, data)
return
}
func ExecuteATemplate(tmpl string, data map[string]string) (rv string) {
funcMapTmpl := template.FuncMap{
"PadR": ms.PadOnRight,
"PadL": ms.PadOnLeft,
"PicTime": ms.PicTime,
"FTime": ms.StrFTime,
"PicFloat": ms.PicFloat,
"nvl": ms.Nvl,
"Concat": ms.Concat,
"title": strings.Title, // The name "title" is what the function will be called in the template text.
"ifDef": ms.IfDef,
"ifIsDef": ms.IfIsDef,
"ifIsNotNull": ms.IfIsNotNull,
"dirname": filepath.Dir, // xyzzyTemplateAdd - basename, dirname,
"basename": filepath.Base,
"Title": strings.Title,
"TmpFileName": ms.GenTmpFileName("./", "", func(fn string) {
data["TmpFileName"] = fn
}),
}
t := template.New("line-template").Funcs(funcMapTmpl)
t, err := t.Parse(tmpl)
if err != nil {
fmt.Fprintf(os.Stderr, "Error(102): Invalid template: %s\n", err)
return tmpl
}
// Create an io.Writer to write to a string
var b bytes.Buffer
foo := bufio.NewWriter(&b)
err = t.ExecuteTemplate(foo, "line-template", data)
// err = t.ExecuteTemplate(os.Stdout, "line-template", data)
if err != nil {
fmt.Fprintf(os.Stderr, "Error(103): Invalid template processing: %s\n", err)
return tmpl
}
foo.Flush()
rv = b.String() // Fetch the data back from the buffer
return
}
func ExecuteATemplateByName(tmpl, tmplName string, data map[string]string) (rv string) {
funcMapTmpl := template.FuncMap{
"PadR": ms.PadOnRight,
"PadL": ms.PadOnLeft,
"PicTime": ms.PicTime,
"FTime": ms.StrFTime,
"PicFloat": ms.PicFloat,
"nvl": ms.Nvl,
"Concat": ms.Concat,
"title": strings.Title, // The name "title" is what the function will be called in the template text.
"ifDef": ms.IfDef,
"ifIsDef": ms.IfIsDef,
"ifIsNotNull": ms.IfIsNotNull,
"dirname": filepath.Dir, // xyzzyTemplateAdd - basename, dirname,
"basename": filepath.Base,
"TmpFileName": ms.GenTmpFileName("./", "", func(fn string) {
data["TmpFileName"] = fn
}),
}
t := template.New("line-template").Funcs(funcMapTmpl)
t, err := t.Parse(tmpl)
// fmt.Printf("---->>>>%s<<<<====, %s\n", tmpl, godebug.LF())
if err != nil {
fmt.Fprintf(os.Stderr, "Error(100): Invalid template: %s\n", err)
return tmpl
}
// Create an io.Writer to write to a string
var b bytes.Buffer
foo := bufio.NewWriter(&b)
err = t.ExecuteTemplate(foo, tmplName, data)
// err = t.ExecuteTemplate(os.Stdout, "line-template", data)
if err != nil {
fmt.Fprintf(os.Stderr, "Error(101): Invalid template processing: %s\n", err)
return tmpl
}
foo.Flush()
rv = b.String() // Fetch the data back from the buffer
return
}
func GetRemoteIP(req *http.Request) string {
if xForwardedHdr := req.Header.Get("X-Forwarded-For"); xForwardedHdr != "" {
return xForwardedHdr
}
host, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
return req.RemoteAddr
}
return host
}
func GetPort(req *http.Request) (rv string) {
_, port, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
return
}
rv = port
return
}