radai rosenblatt created HTTPCORE-335:
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Summary: add utility method to EntityUtils to allow reading entity
contents into a user-provided OutputStream
Key: HTTPCORE-335
URL: https://issues.apache.org/jira/browse/HTTPCORE-335
Project: HttpComponents HttpCore
Issue Type: Improvement
Components: HttpCore
Affects Versions: 4.2.3
Reporter: radai rosenblatt
as a user of HttpComponents the most basic way i have to download a large
binary file using HttpCore would be:
{code}
HttpResponse response = get(url, null, null);
HttpEntity entity = response.getEntity();
byte[] data = EntityUtils.toByteArray(entity);
{code}
while this works, it has the downside of storing what might be a pretty big
file as a byte[] in memory.
adding an extra method to EntityUtils would allow the same functionality with a
much smaller memory footprint:
{code}
HttpResponse response = get(url, null, null);
HttpEntity entity = response.getEntity();
//user's responsibility to provide an output stream. commonly a temporary file?
File tmpFile = getMeATmpFile();
FileOutputStream os = new FileOutputStream(tmpFile);
long bytesWritten = EntityUtils.writeOut(entity,os);
//user can now work with entity contents that he has "downloaded" to the temp
file.
{code}
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