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Add option for reading images from local filesystem

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This commit is contained in:
Vasily Fedoseyev
2017-12-29 22:59:20 +03:00
parent f9fbfefad6
commit 850498f817
3 changed files with 25 additions and 0 deletions
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1
README.md
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@@ -144,6 +144,7 @@ $ xxd -g 2 -l 64 -p /dev/random | tr -d '\n'
* `IMGPROXY_CONCURRENCY` — the maximum number of image requests to be processed simultaneously. Default: double number of CPU cores; * `IMGPROXY_CONCURRENCY` — the maximum number of image requests to be processed simultaneously. Default: double number of CPU cores;
* `IMGPROXY_MAX_CLIENTS` — the maximum number of simultaneous active connections. Default: `IMGPROXY_CONCURRENCY * 5`; * `IMGPROXY_MAX_CLIENTS` — the maximum number of simultaneous active connections. Default: `IMGPROXY_CONCURRENCY * 5`;
* `IMGPROXY_TTL` — duration in seconds sent in `Expires` and `Cache-Control: max-age` headers. Default: `3600` (1 hour); * `IMGPROXY_TTL` — duration in seconds sent in `Expires` and `Cache-Control: max-age` headers. Default: `3600` (1 hour);
* `IMGPROXY_LOCAL_FILESYSTEM_ROOT` — root directory path for serving images from local filesystem via `local:///image.ext`. Default: disabled
#### Security #### Security

19
config.go
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@@ -85,6 +85,8 @@ type config struct {
Salt []byte Salt []byte
Secret string Secret string
LocalFileSystemRoot string
} }
var conf = config{ var conf = config{
@@ -98,6 +100,7 @@ var conf = config{
MaxSrcResolution: 16800000, MaxSrcResolution: 16800000,
Quality: 80, Quality: 80,
GZipCompression: 5, GZipCompression: 5,
LocalFileSystemRoot: "",
} }
func init() { func init() {
@@ -132,6 +135,8 @@ func init() {
strEnvConfig(&conf.Secret, "IMGPROXY_SECRET") strEnvConfig(&conf.Secret, "IMGPROXY_SECRET")
strEnvConfig(&conf.LocalFileSystemRoot, "IMGPROXY_LOCAL_FILESYSTEM_ROOT")
if len(conf.Key) == 0 { if len(conf.Key) == 0 {
log.Fatalln("Key is not defined") log.Fatalln("Key is not defined")
} }
@@ -187,6 +192,20 @@ func init() {
log.Fatalf("GZip compression can't be greater than 9, now - %d\n", conf.GZipCompression) log.Fatalf("GZip compression can't be greater than 9, now - %d\n", conf.GZipCompression)
} }
if conf.LocalFileSystemRoot != "" {
stat, err := os.Stat(conf.LocalFileSystemRoot)
if err != nil {
log.Fatalf("Cannot use local directory: %s", err)
} else {
if !stat.IsDir() {
log.Fatalf("Cannot use local directory: not a directory")
}
}
if conf.LocalFileSystemRoot == "/" {
log.Print("Exposing root via IMGPROXY_LOCAL_FILESYSTEM_ROOT is unsafe")
}
}
initVips() initVips()
initDownloading() initDownloading()
} }

5
download.go
View File

@@ -56,8 +56,13 @@ func (r *netReader) GrowBuf(s int) {
} }
func initDownloading() { func initDownloading() {
transport := &http.Transport{}
if conf.LocalFileSystemRoot != "" {
transport.RegisterProtocol("local", http.NewFileTransport(http.Dir(conf.LocalFileSystemRoot)))
}
downloadClient = &http.Client{ downloadClient = &http.Client{
Timeout: time.Duration(conf.DownloadTimeout) * time.Second, Timeout: time.Duration(conf.DownloadTimeout) * time.Second,
Transport: transport,
} }
} }