我一直在尝试使用Android和NCBI blast website查询BioJava。我正在使用Eclipse和Android模拟器。当我将代码作为Android应用程序运行时,我收到以下错误:
W/System.err(533): java.io.IOException: An error occured submiting sequence to BLAST server. Cause: content-length promised 2000 bytes, but received 214
当我使用相同的代码并将其作为常规Java应用程序运行时,它可以完美运行。关于它可能是什么的任何想法?
答案 0 :(得分:14)
当我尝试在Android中发出POST请求时,它也出现了。 如果你在标题中设置Content-Length并且实际内容的长度不同,那么它会在Android中抛出IOException
(在普通的JDK中它有效,尽管它是错误的)
您可以使用以下代码重现Exception:
try {
URL oracle = new URL("http://oasth.gr/tools/lineTimes.php");
HttpURLConnection yc = (HttpURLConnection) oracle.openConnection();
yc.setRequestProperty("User-Agent",
"Mozilla/5.0 (X11; Linux i686; rv:2.0b12) Gecko/20110222 Firefox/4.0b12");
yc.setRequestProperty("Referer",
"http://oasth.gr/tools/lineTimes.php");
yc.setRequestProperty("Accept-Language",
"el-gr,el;q=0.8,en-us;q=0.5,en;q=0.3");
yc.setRequestProperty("Accept-Charset",
"ISO-8859-7,utf-8;q=0.7,*;q=0.7");
// content length should be 29 !!
yc.setRequestProperty("Content-Length", "1000");
// content length is 29 !
String parames = "bline=63&goes=a&lineStops=886";
yc.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(yc.getOutputStream());
wr.write(parames);
wr.flush();
Log.d(TAG, "" + yc.getResponseCode());
BufferedReader in = new BufferedReader(new InputStreamReader(
yc.getInputStream()));
String inputLine;
StringBuilder sbu = new StringBuilder();
while ((inputLine = in.readLine()) != null)
sbu.append(inputLine);
wr.close();
in.close();
} catch (IOException e) {
e.printStackTrace();
Log.e("getLinesArrival Exception", e.getMessage());
}
所以如果删除行
yc.setRequestProperty("Content-Length", "1000");
它会起作用!