Question

如何将URL输出的JSON保存到文件中？

例如来自Twitter搜索API（此http://search.twitter.com/search.json?q=hi）

语言并不重要。

编辑//我如何向EOF追加更新？

编辑2 //真的很棒的答案，但我接受了我认为最优雅的那个。

Answer 1

这在任何语言中都很容易，但机制各不相同。使用wget和shell：

wget 'http://search.twitter.com/search.json?q=hi' -O hi.json

追加：

wget 'http://search.twitter.com/search.json?q=hi' -O - >> hi.json

使用Python：

urllib.urlretrieve('http://search.twitter.com/search.json?q=hi', 'hi.json')

追加：

hi_web = urllib2.urlopen('http://search.twitter.com/search.json?q=hi');
with open('hi.json', 'ab') as hi_file:
  hi_file.write(hi_web.read())

Answer 2

您可以使用CURL

curl -d "q=hi" http://search.twitter.com -o file1.txt

Answer 3

在PHP中：

$outfile= 'result.json';
$url='http://search.twitter.com/search.json?q=hi';
$json = file_get_contents($url);
if($json) { 
    if(file_put_contents($outfile, $json, FILE_APPEND)) {
      echo "Saved JSON fetched from “{$url}” as “{$outfile}”.";
    }
    else {
      echo "Unable to save JSON to “{$outfile}”.";
    }
}
else {
   echo "Unable to fetch JSON from “{$url}”.";
}

Answer 4

这是（详细;）Java变体：

InputStream input = null;
OutputStream output = null;
try {
    input = new URL("http://search.twitter.com/search.json?q=hi").openStream();
    output = new FileOutputStream("/output.json");
    byte[] buffer = new byte[1024];
    for (int length = 0; (length = input.read(buffer)) > 0;) {
        output.write(buffer, 0, length);
    }
    // Here you could append further stuff to `output` if necessary.
} finally {
    if (output != null) try { output.close(); } catch (IOException logOrIgnore) {}
    if (input != null) try { input.close(); } catch (IOException logOrIgnore) {}
}

另见：

Answer 5

在shell中：

wget -O output.json 'http://search.twitter.com/search.json?q=hi'

Answer 6

您可以使用Jackson：

 ObjectMapper mapper = new ObjectMapper(); 
 Map<String,Object> map = mapper.readValue(url, Map.class);
 mapper.writeValue(new File("myfile.json"), map);

Answer 7

这是使用PHP和fOpen执行此操作的另一种方法。

<?php
// Define your output file name and your search query
$output = 'result.txt';
$search = 'great';

write_twitter_to_file($output, $search);

/*
 * Writes Json responses from twitter API to a file output.
 * 
 * @param $output: The name of the file that contains the output 
 * @param $search: The search term query to use in the Twitter API
*/

function write_twitter_to_file($output, $search) {
    $search = urlencode($search);
    $url = 'http://search.twitter.com/search.json?q=' . $search;
    $handle = fopen($url, "r");

    if ($handle) {
        while (($buffer = fgets($handle, 4096)) !== false) {
            file_put_contents($output, $buffer, FILE_APPEND);
            echo "Output has been saved to file<br/>";
        }

        if (!feof($handle)) {
            echo "Error: unexpected fgets() fail\n";
        }

        fclose($handle);
    }

}
?>

将URL输出的JSON保存到文件中

7 个答案: