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  • RestTemplate 超级严重BUG之 restTemplate.getForEntity对于下载文件的地址请求 header不起作用

    错误下载:
    RestTemplate restTemplate=new RestTemplate();
    HttpHeaders httpHeaders=new HttpHeaders();
    httpHeaders.set(HttpHeaders.RANGE,"bytes=" + 0 + "-" + 10);
    org.springframework.http.HttpEntity<byte[]> httpEntity=new org.springframework.http.HttpEntity<>(httpHeaders);
    ResponseEntity<byte[]> resp = restTemplate.getForEntity("http://b-ssl.duitang.com/uploads/item/201804/29/20180429134705_yk5mz.jpeg", byte[].class,httpEntity);
    System.out.println(Thread.currentThread().getName()+":"+resp.getBody().length);
    资源总共:1078729byte 希望下载11byte 结果下载结果为1078729byte 结论:header设置没有起作用

    正确下载:

    RestTemplate restTemplate=new RestTemplate();
    HttpHeaders httpHeaders=new HttpHeaders();
    httpHeaders.set(HttpHeaders.RANGE,"bytes=" + 0 + "-" + 10);
    org.springframework.http.HttpEntity<byte[]> httpEntity=new org.springframework.http.HttpEntity<>(httpHeaders);
    ResponseEntity<byte[]> rsp = restTemplate.exchange("http://b-ssl.duitang.com/uploads/item/201804/29/20180429134705_yk5mz.jpeg", HttpMethod.GET, httpEntity, byte[].class);
    System.out.println(Thread.currentThread().getName()+":"+rsp.getBody().length);

    橙色为唯一不同代码:把getForEntity 换为了exchage 下载结果正确
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  • 原文地址:https://www.cnblogs.com/coderdxj/p/11629802.html
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