Examples with UriTemplate com.damnhandy.uri.template.UriTemplate used on opensource projects

Example 1 with UriTemplate

use of com.damnhandy.uri.template.UriTemplate in project wso2-synapse by wso2.

the class HTTPEndpoint method processUrlTemplate.

private void processUrlTemplate(MessageContext synCtx) throws ExpressionParseException {
    Map<String, Object> variables = new HashMap<String, Object>();
    /*The properties with uri.var.* are only considered for Outbound REST Endpoints*/
    Set propertySet = synCtx.getPropertyKeySet();
    // We have to create a local UriTemplate object, or else the UriTemplate.set(variables) call will fill up a list of variables and since uriTemplate
    // is not thread safe, this list won't be clearing.
    UriTemplate template = null;
    String evaluatedUri = "";
    // legacySupport for backward compatibility where URI Template decoding handled via HTTPEndpoint
    if (legacySupport) {
        for (Object propertyKey : propertySet) {
            if (propertyKey.toString() != null && (propertyKey.toString().startsWith(RESTConstants.REST_URI_VARIABLE_PREFIX) || propertyKey.toString().startsWith(RESTConstants.REST_QUERY_PARAM_PREFIX))) {
                Object objProperty = synCtx.getProperty(propertyKey.toString());
                if (objProperty != null) {
                    if (objProperty instanceof String) {
                        variables.put(propertyKey.toString(), decodeString((String) synCtx.getProperty(propertyKey.toString())));
                    } else {
                        variables.put(propertyKey.toString(), decodeString(String.valueOf(synCtx.getProperty(propertyKey.toString()))));
                    }
                }
            }
        }
        // Include properties defined at endpoint.
        Iterator endpointProperties = getProperties().iterator();
        while (endpointProperties.hasNext()) {
            MediatorProperty property = (MediatorProperty) endpointProperties.next();
            if (property.getName().toString() != null && (property.getName().toString().startsWith(RESTConstants.REST_URI_VARIABLE_PREFIX) || property.getName().toString().startsWith(RESTConstants.REST_QUERY_PARAM_PREFIX))) {
                variables.put(property.getName(), decodeString((String) property.getValue()));
            }
        }
        template = UriTemplate.fromTemplate(uriTemplate.getTemplate());
        if (template != null) {
            template.set(variables);
        }
        if (variables.isEmpty()) {
            evaluatedUri = template.getTemplate();
        } else {
            try {
                // Decode needs to avoid replacing special characters(e.g %20 -> %2520) when creating URL.
                String decodedString = URLDecoder.decode(template.expand(), "UTF-8");
                URL url = new URL(decodedString);
                URI uri = new URI(url.getProtocol(), url.getUserInfo(), url.getHost(), url.getPort(), url.getPath(), url.getQuery(), // this to avoid url.toURI which causes exceptions
                url.getRef());
                evaluatedUri = uri.toURL().toString();
                if (log.isDebugEnabled()) {
                    log.debug("Expanded URL : " + evaluatedUri);
                }
            } catch (URISyntaxException e) {
                if (log.isDebugEnabled()) {
                    log.debug("Invalid URL syntax for HTTP Endpoint: " + this.getName(), e);
                }
                evaluatedUri = template.getTemplate();
            } catch (ExpressionParseException e) {
                log.debug("No URI Template variables defined in HTTP Endpoint: " + this.getName());
                evaluatedUri = template.getTemplate();
            } catch (MalformedURLException e) {
                log.debug("Invalid URL for HTTP Endpoint: " + this.getName());
                evaluatedUri = template.getTemplate();
            } catch (UnsupportedEncodingException e) {
                log.debug("Exception while decoding the URL in HTTP Endpoint: " + this.getName());
                evaluatedUri = template.getTemplate();
            }
        }
    } else {
        // URI Template encoding not handled by HTTP Endpoint, compliant with RFC6570
        for (Object propertyKey : propertySet) {
            if (propertyKey.toString() != null && (propertyKey.toString().startsWith(RESTConstants.REST_URI_VARIABLE_PREFIX) || propertyKey.toString().startsWith(RESTConstants.REST_QUERY_PARAM_PREFIX))) {
                Object objProperty = synCtx.getProperty(propertyKey.toString());
                if (objProperty != null) {
                    if (objProperty instanceof String) {
                        variables.put(propertyKey.toString(), (String) synCtx.getProperty(propertyKey.toString()));
                    } else {
                        variables.put(propertyKey.toString(), (String) String.valueOf(synCtx.getProperty(propertyKey.toString())));
                    }
                }
            }
        }
        // Include properties defined at endpoint.
        Iterator endpointProperties = getProperties().iterator();
        while (endpointProperties.hasNext()) {
            MediatorProperty property = (MediatorProperty) endpointProperties.next();
            if (property.getName().toString() != null && (property.getName().toString().startsWith(RESTConstants.REST_URI_VARIABLE_PREFIX) || property.getName().toString().startsWith(RESTConstants.REST_QUERY_PARAM_PREFIX))) {
                variables.put(property.getName(), (String) property.getValue());
            }
        }
        String tmpl;
        // this was used in connectors Eg:- uri-template="{uri.var.variable}"
        if (uriTemplate.getTemplate().charAt(0) == '{' && uriTemplate.getTemplate().charAt(1) != '+') {
            tmpl = "{+" + uriTemplate.getTemplate().substring(1);
        } else {
            tmpl = uriTemplate.getTemplate();
        }
        template = UriTemplate.fromTemplate(tmpl);
        if (template != null) {
            template.set(variables);
        }
        if (variables.isEmpty()) {
            evaluatedUri = template.getTemplate();
        } else {
            try {
                URI uri = new URI(template.expand());
                evaluatedUri = uri.toString();
                if (log.isDebugEnabled()) {
                    log.debug("Expanded URL : " + evaluatedUri);
                }
            } catch (URISyntaxException e) {
                if (log.isDebugEnabled()) {
                    log.debug("Invalid URL syntax for HTTP Endpoint: " + this.getName(), e);
                }
                evaluatedUri = template.getTemplate();
            } catch (ExpressionParseException e) {
                log.debug("No URI Template variables defined in HTTP Endpoint: " + this.getName());
                evaluatedUri = template.getTemplate();
            }
        }
    }
    if (evaluatedUri != null) {
        synCtx.setTo(new EndpointReference(evaluatedUri));
        if (super.getDefinition() != null) {
            synCtx.setProperty(EndpointDefinition.DYNAMIC_URL_VALUE, evaluatedUri);
        }
    }
}