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Add safety barrier between concatenated javascript resources

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This commit is contained in:
Vincent Fiduccia 2019-06-01 23:56:19 -07:00 committed by Bjørn Erik Pedersen
parent 8914fe7ed7
commit 35abce27ca
2 changed files with 40 additions and 3 deletions
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18
hugolib/resource_chain_test.go
View file

@ -244,6 +244,13 @@ T2: Content: {{ $combinedText.Content }}|{{ $combinedText.RelPermalink }}
{{ $css := "body { color: blue; }" | resources.FromString "styles.css" }}
{{ $minified := resources.Get "css/styles1.css" | minify }}
{{ slice $css $minified | resources.Concat "bundle/mixed.css" }}
{{/* https://github.com/gohugoio/hugo/issues/5403 */}}
{{ $d := "function D {} // A comment" | resources.FromString "d.js"}}
{{ $e := "(function E {})" | resources.FromString "e.js"}}
{{ $f := "(function F {})()" | resources.FromString "f.js"}}
{{ $jsResources := .Resources.Match "*.js" }}
{{ $combinedJs := slice $d $e $f | resources.Concat "bundle/concatjs.js" }}
T3: Content: {{ $combinedJs.Content }}|{{ $combinedJs.RelPermalink }}
`)
}, func(b *sitesBuilder) {
b.AssertFileContent("public/index.html", `T1: Content: ABC|RelPermalink: /bundle/concat.txt|Permalink: http://example.com/bundle/concat.txt|MediaType: text/plain`)
@ -251,6 +258,17 @@ T2: Content: {{ $combinedText.Content }}|{{ $combinedText.RelPermalink }}
b.AssertFileContent("public/index.html", `T2: Content: t1t|t2t|`)
b.AssertFileContent("public/bundle/concattxt.txt", "t1t|t2t|")
b.AssertFileContent("public/index.html", `T3: Content: function D {} // A comment
;
(function E {})
;
(function F {})()|`)
b.AssertFileContent("public/bundle/concatjs.js", `function D {} // A comment
;
(function E {})
;
(function F {})()`)
}},
{"fromstring", func() bool { return true }, func(b *sitesBuilder) {
b.WithTemplates("home.html", `

21
resources/resource_factories/bundler/bundler.go
View file

@ -15,6 +15,7 @@
package bundler
import (
"bytes"
"fmt"
"io"
"path/filepath"
@ -92,13 +93,31 @@ func (c *Client) Concat(targetPath string, r resource.Resources) (resource.Resou
}
return nil, err
}
rcsources = append(rcsources, rc)
}
readers := make([]io.Reader, len(rcsources))
var readers []io.Reader
// Arbitrary JavaScript files require a barrier between them to be safely concatenated together.
// Without this, the last line of one file can affect the first line of the next file and change how both files are interpreted.
if resolvedm.MainType == media.JavascriptType.MainType && resolvedm.SubType == media.JavascriptType.SubType {
readers = make([]io.Reader, 2*len(rcsources)-1)
j := 0
for i := 0; i < len(rcsources); i++ {
if i > 0 {
readers[j] = bytes.NewBufferString("\n;\n")
j++
}
readers[j] = rcsources[i]
j++
}
} else {
readers = make([]io.Reader, len(rcsources))
for i := 0; i < len(rcsources); i++ {
readers[i] = rcsources[i]
}
}
mr := io.MultiReader(readers...)