fix: recognize small text files (filebrowser#531)

chinglinwen · 1138-4EB · commit a0194899c922 · 2018-09-08T19:03:12.000+01:00
diff --git a/lib/file.go b/lib/file.go
@@ -223,14 +223,14 @@ func (i *File) GetFileType(checkContent bool) error {
 
 		// Only the first 512 bytes are used to sniff the content type.
 		buffer := make([]byte, 512)
-		_, err = file.Read(buffer)
+		n, err := file.Read(buffer)
 		if err != nil && err != io.EOF {
 			return err
 		}
 
 		// Tries to get the file mimetype using its first
 		// 512 bytes.
-		mimetype = http.DetectContentType(buffer)
+		mimetype = http.DetectContentType(buffer[:n])
 	}
 
 	if strings.HasPrefix(mimetype, "video") {

Original file line number	Diff line number	Diff line change
`@@ -223,14 +223,14 @@ func (i *File) GetFileType(checkContent bool) error {`
`223`	`223`
`224`	`224`	`// Only the first 512 bytes are used to sniff the content type.`
`225`	`225`	`buffer := make([]byte, 512)`
`226`		`- _, err = file.Read(buffer)`
	`226`	`+ n, err := file.Read(buffer)`
`227`	`227`	`if err != nil && err != io.EOF {`
`228`	`228`	`return err`
`229`	`229`	`}`
`230`	`230`
`231`	`231`	`// Tries to get the file mimetype using its first`
`232`	`232`	`// 512 bytes.`
`233`		`- mimetype = http.DetectContentType(buffer)`
	`233`	`+ mimetype = http.DetectContentType(buffer[:n])`
`234`	`234`	`}`
`235`	`235`
`236`	`236`	`if strings.HasPrefix(mimetype, "video") {`