#Install JWT Apex classes
Install JWT.apex and JWTBearer.apex from https://github.com/salesforceidentity/jwt
Install Vision.apex and HttpFormBuilder.apex
#Visualforce page example
public class VisionController {
// You can upload the `einstein_platform.pem` into your Salesforce org as `File` sObject and read it as below
public String getAccessToken() {
// Ignore the File upload part and "jwt.pkcs" if you used a Salesforce certificate to sign up
// for an Einstein Platform account
ContentVersion base64Content = [SELECT Title, VersionData FROM ContentVersion where Title='einstein_platform' OR Title='predictive_services' ORDER BY Title LIMIT 1];
String keyContents = base64Content.VersionData.tostring();
keyContents = keyContents.replace('-----BEGIN RSA PRIVATE KEY-----', '');
keyContents = keyContents.replace('-----END RSA PRIVATE KEY-----', '');
keyContents = keyContents.replace('\n', '');
// Get a new token
JWT jwt = new JWT('RS256');
// jwt.cert = 'JWTCert'; // Uncomment this if you used a Salesforce certificate to sign up for an Einstein Platform account
jwt.pkcs8 = keyContents; // Comment this if you are using jwt.cert
jwt.iss = 'developer.force.com';
jwt.sub = 'yourname@example.com';
jwt.aud = 'https://api.einstein.ai/v2/oauth2/token';
jwt.exp = '3600';
String access_token = JWTBearerFlow.getAccessToken('https://api.einstein.ai/v2/oauth2/token', jwt);
return access_token;
}
public List<Vision.Prediction> getCallVisionUrl() {
// Get a new token
String access_token = getAccessToken();
// Make a prediction using URL to a file
return Vision.predictUrl('https://einstein.ai/images/generalimage.jpg',access_token,'GeneralImageClassifier');
}
public List<Vision.Prediction> getCallVisionContent() {
// Get a new token
String access_token = getAccessToken();
// Make a prediction for an image stored in Salesforce
// by passing the file as blob which is then converted to base64 string
ContentVersion content = [SELECT Title,VersionData FROM ContentVersion where Id = '06841000000LkfCAAS' LIMIT 1];
return Vision.predictBlob(content.VersionData, access_token, 'GeneralImageClassifier');
}
}<apex:page Controller="VisionController">
<apex:form >
<apex:pageBlock >
<apex:image url="https://einstein.ai/images/generalimage.jpg">
</apex:image>
<br/>
<apex:repeat value="{!AccessToken}" var="accessToken">
Access Token:<apex:outputText value="{!accessToken}" /><br/>
</apex:repeat>
<br/>
<apex:repeat value="{!callVisionUrl}" var="prediction">
<apex:outputText value="{!prediction.label}" />:<apex:outputText value="{!prediction.probability}" /><br/>
</apex:repeat>
</apex:pageBlock>
<!-- <apex:pageBlock > -->
<!-- <apex:repeat value="{!callVisionContent}" var="prediction"> -->
<!-- <apex:outputText value="{!prediction.label}" />:<apex:outputText value="{!prediction.probability}" /><br/> -->
<!-- </apex:repeat> -->
<!-- </apex:pageBlock> -->
</apex:form>
</apex:page>