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Add md5 and sha1 template funcs
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3 changed files with 107 additions and 1 deletions
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@ -595,6 +595,33 @@ CJK-like languages.
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```
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### md5
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`md5` hashes the given input and returns its MD5 checksum.
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```html
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{{ md5 "Hello world, gophers!" }}
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<!-- returns the string "b3029f756f98f79e7f1b7f1d1f0dd53b" -->
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```
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This can be useful if you want to use Gravatar for generating a unique avatar:
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```html
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<img src="https://www.gravatar.com/avatar/{{ md5 "your@email.com" }}?s=100&d=identicon">
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```
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### sha1
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`sha1` hashes the given input and returns its SHA1 checksum.
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```html
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{{ sha1 "Hello world, gophers!" }}
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<!-- returns the string "c8b5b0e33d408246e30f53e32b8f7627a7a649d4" -->
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```
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## URLs
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### absURL, relURL
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@ -15,7 +15,10 @@ package tpl
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import (
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"bytes"
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_md5 "crypto/md5"
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_sha1 "crypto/sha1"
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"encoding/base64"
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"encoding/hex"
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"encoding/json"
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"errors"
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"fmt"
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@ -1501,6 +1504,28 @@ func singularize(in interface{}) (string, error) {
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return inflect.Singularize(word), nil
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}
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// md5 hashes the given input and returns its MD5 checksum
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func md5(in interface{}) (string, error) {
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conv, err := cast.ToStringE(in)
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if err != nil {
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return "", err
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}
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hash := _md5.Sum([]byte(conv))
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return hex.EncodeToString(hash[:]), nil
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}
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// sha1 hashes the given input and returns its SHA1 checksum
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func sha1(in interface{}) (string, error) {
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conv, err := cast.ToStringE(in)
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if err != nil {
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return "", err
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}
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hash := _sha1.Sum([]byte(conv))
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return hex.EncodeToString(hash[:]), nil
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}
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func init() {
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funcMap = template.FuncMap{
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"absURL": func(a string) template.HTML { return template.HTML(helpers.AbsURL(a)) },
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@ -1538,6 +1563,7 @@ func init() {
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"lower": func(a string) string { return strings.ToLower(a) },
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"lt": lt,
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"markdownify": markdownify,
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"md5": md5,
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"mod": mod,
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"modBool": modBool,
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"mul": func(a, b interface{}) (interface{}, error) { return doArithmetic(a, b, '*') },
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@ -1556,6 +1582,7 @@ func init() {
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"sanitizeURL": helpers.SanitizeURL,
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"sanitizeurl": helpers.SanitizeURL,
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"seq": helpers.Seq,
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"sha1": sha1,
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"shuffle": shuffle,
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"singularize": singularize,
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"slice": slice,
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@ -99,6 +99,8 @@ seq: {{ seq 3 }}
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sort: {{ slice "B" "C" "A" | sort }}
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delimit: {{ delimit (slice "A" "B" "C") ", " " and " }}
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jsonify: {{ (slice "A" "B" "C") | jsonify }}
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md5: {{ md5 "Hello world, gophers!" }}
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sha1: {{ sha1 "Hello world, gophers!" }}
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`
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expected := `chomp: <p>Blockhead</p>
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dateFormat: Wednesday, Jan 21, 2015
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@ -134,6 +136,8 @@ seq: [1 2 3]
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sort: [A B C]
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delimit: A, B and C
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jsonify: ["A","B","C"]
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md5: b3029f756f98f79e7f1b7f1d1f0dd53b
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sha1: c8b5b0e33d408246e30f53e32b8f7627a7a649d4
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`
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var b bytes.Buffer
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@ -155,7 +159,7 @@ jsonify: ["A","B","C"]
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err = templ.Execute(&b, &data)
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if err != nil {
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t.Fatal("Gott error on execute", err)
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t.Fatal("Got error on execute", err)
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}
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if b.String() != expected {
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@ -2056,3 +2060,51 @@ func TestBase64Encode(t *testing.T) {
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t.Error("Expected error from base64Encode")
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}
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}
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func TestMD5(t *testing.T) {
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for i, this := range []struct {
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input string
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expectedHash string
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}{
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{"Hello world, gophers!", "b3029f756f98f79e7f1b7f1d1f0dd53b"},
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{"Lorem ipsum dolor", "06ce65ac476fc656bea3fca5d02cfd81"},
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} {
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result, err := md5(this.input)
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if err != nil {
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t.Errorf("md5 returned error: %s", err)
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}
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if result != this.expectedHash {
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t.Errorf("[%d] md5: expected '%s', got '%s'", i, this.expectedHash, result)
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}
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_, err = md5(t)
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if err == nil {
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t.Error("Expected error from md5")
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}
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}
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}
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func TestSHA1(t *testing.T) {
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for i, this := range []struct {
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input string
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expectedHash string
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}{
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{"Hello world, gophers!", "c8b5b0e33d408246e30f53e32b8f7627a7a649d4"},
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{"Lorem ipsum dolor", "45f75b844be4d17b3394c6701768daf39419c99b"},
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} {
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result, err := sha1(this.input)
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if err != nil {
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t.Errorf("sha1 returned error: %s", err)
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}
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if result != this.expectedHash {
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t.Errorf("[%d] sha1: expected '%s', got '%s'", i, this.expectedHash, result)
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}
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_, err = sha1(t)
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if err == nil {
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t.Error("Expected error from sha1")
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}
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}
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}
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