Can't send image to azure API - reactjs

Question

I'm making OCR app using amazon. App I'm doing using react native. And I have an error on the moment when I send data.
Error:
{
"code": "InvalidImageUrl",
"requestId": "c495b0d7-a65a-4138-97a9-2b1cb25dced8",
"message": "Image URL is badly formatted."
}
Why? What am I doing wrong? Code:
// ...
selectImage() {
ImagePicker.showImagePicker(options, (response) => {
if (response.didCancel) {
console.log('User cancelled image picker');
} else if (response.error) {
console.log('ImagePicker Error: ', response.error);
} else if (response.customButton) {
console.log('User tapped custom button: ', response.customButton);
} else {
const source = { uri: response.uri };
this.setState({ imageSource: source });
this.extractText(response.uri);
}
});
}
extractText = async (imageSource) => {
// alert(imageSource)
let subscriptionKey = ['CODE'];
let endpoint = ['ENDPOINT']
if (!subscriptionKey) { throw new Error('Set your environment variables for your subscription key and endpoint.'); }
var uriBase = endpoint + "vision/v2.1/ocr";
// Request parameters.
// Display the image.
var sourceImageUrl = imageSource;
const data = new FormData();
data.append(imageSource);
fetch(uriBase + "?" + {
"language": "unk",
"detectOrientation": "true",
},
{
method: 'POST',
headers:
{
'Content-Type': 'application/json',
'Ocp-Apim-Subscription-Key': subscriptionKey,
},
body: '{"url": ' + '"' + data + '"}',
}).then((response) => response.json()).then((data) =>
{
console.log(JSON.stringify(data, null, 2));
}).catch((error) =>
{
console.log(error);
});
};
}
export default ImagePickerScreen;

Answer 1

Based on your code,there is something wrong with your data,it should an image URL so that Azure Version service can access it . I am not quite sure that how you get data in your custom logic . But anyway , this snippet below works , pls have a try :
const data = 'https://stanstroage.blob.core.windows.net/container2/personPic.jpg';
let subscriptionKey = '<key>';
let endpoint = '<endpoint>';
if (!subscriptionKey) { throw new Error('Set your environment variables for your subscription key and endpoint.'); }
var uriBase = endpoint + "vision/v2.1/ocr";
fetch(uriBase + "?" + {
"language": "unk",
"detectOrientation": "true",
},
{
method: 'POST',
headers:
{
'Content-Type': 'application/json',
'Ocp-Apim-Subscription-Key': subscriptionKey,
},
body: '{"url": ' + '"' + data + '"}',
}).then((response) => response.json()).then((data) =>
{
console.log(JSON.stringify(data, null, 2));
}).catch((error) =>
{
console.log(error);
});
Result:
If you want to upload a local image, you should use application/octet-stream as request content-type and set image content buffer as request body.
You can use react-native-fs to read your local image content and use buffer to get image content buffer and post it to Azure side , try snippet below below :
let subscriptionKey = '<key>';
let endpoint = '<endpoint>';
let fileUri = '<fileUri>';
let base64 = await fs.readFile(fileUri, 'base64');
let data = Buffer.from(base64, 'base64');
console.log(data);
if (!subscriptionKey) { throw new Error('Set your environment variables for your subscription key and endpoint.'); }
var uriBase = endpoint + "vision/v2.1/ocr";
fetch(uriBase + "?" + {
"language": "unk",
"detectOrientation": "true",
},
{
method: 'POST',
headers:
{
'Content-Type': 'application/octet-stream',
'Ocp-Apim-Subscription-Key': subscriptionKey,
},
body: data,
}).then((response) => response.json()).then((data) =>
{
console.log(JSON.stringify(data, null, 2));
}).catch((error) =>
{
console.log(error);
});
Result :