Spring Cloud 中的一個陷阱

在使用Spring Cloud時，要注意：服務名不能以http開頭，下面是spring-cloud-netflix-core-1.4.x中的代碼：

package org.springframework.cloud.netflix.feign;
class FeignClientFactoryBean implements FactoryBean<Object>, InitializingBean,
        ApplicationContextAware {

    [@Override](https://my.oschina.net/u/1162528)
    public Object getObject() throws Exception {
        FeignContext context = applicationContext.getBean(FeignContext.class);
        Feign.Builder builder = feign(context);

        if (!StringUtils.hasText(this.url)) {
            String url;
            // 這塊應該改爲 if (!(this.name.startsWith("http://") || this.name.startsWith("https://"))) {
            if (!this.name.startsWith("http")) {
                url = "http://" + this.name;
            }
            else {
                url = this.name;
            }
            url += cleanPath();
            return loadBalance(builder, context, new HardCodedTarget<>(this.type,
                    this.name, url));
        }
        if (StringUtils.hasText(this.url) && !this.url.startsWith("http")) {
            this.url = "http://" + this.url;
        }
        String url = this.url + cleanPath();
        Client client = getOptional(context, Client.class);
        if (client != null) {
            if (client instanceof LoadBalancerFeignClient) {
                // not lod balancing because we have a url,
                // but ribbon is on the classpath, so unwrap
                client = ((LoadBalancerFeignClient)client).getDelegate();
            }
            builder.client(client);
        }
        Targeter targeter = get(context, Targeter.class);
        return targeter.target(this, builder, context, new HardCodedTarget<>(
                this.type, this.name, url));
    }
}