support jpeg？

[halfcrazy]

when i use the following code to ocr a jpeg format pic.

img_url := "http://cityjw.dlut.edu.cn:7001/ACTIONVALIDATERANDOMPICTURE.APPPROCESS"
resp, err := client.Get(img_url)
if err != nil {
// handle error
}
defer resp.Body.Close()
OcrClient, _ := gosseract.NewClient()
img, _ := jpeg.Decode(resp.Body)
out, _ := OcrClient.Image(img).Out()
fmt.Println(out)

and then i got some error.

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x0 pc=0x43926a]

goroutine 1 [running]:
runtime.panic(0x664a20, 0x965b48)
/usr/lib/go/src/pkg/runtime/panic.c:266 +0xb6
github.com/otiai10/gosseract.(*Client).Image(0x0, 0x7f008865e7a0, 0xc210059480, 0x0)
/home/halfcrazy/gocode/src/github.com/otiai10/gosseract/client.go:58 +0x13a
main.main()
/home/halfcrazy/gocode/src/school_helper/main.go:29 +0x204

[otiai10]

@halfcrazy
Thanks to comment.
At first, this code works well in my environment.
#29

Anyway, through inspecting the reason why your code doesn't work, I found the file-extension I can get from that URL is ".appprocess".

I guess your decoding returns some error and img is pointing to nil.

img, _ := jpeg.Decode(resp.Body)

Please check it out

[JayXon]

I just got the same panic from client.go:58.
But it turns out the reason was I don't have tesseract in my PATH.
Maybe you should make gosseract to print an error if tesseract is not in PATH.

[otiai10]

@JayXon
Oh! Thank you very much!!
I'll impl it

[halfcrazy]

@JayXon @otiai10 THX