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| public void readFile(File fichier){
FacesContext facesContext = FacesContext.getCurrentInstance();
ExternalContext externalContext = facesContext.getExternalContext();
HttpServletResponse response = (HttpServletResponse) externalContext.getResponse();
BufferedInputStream input = null;
BufferedOutputStream output = null;
try {
// Open file.
input = new BufferedInputStream(new FileInputStream(fichier), 10240);
// Init servlet response.
response.reset();
// lire un fichier pdf
response.setHeader("Content-type", "application/pdf");
response.setContentLength((int)fichier.length());
response.setHeader("Content-disposition", "attachment; filename=" + fichier.getName());
response.setHeader("pragma", "public");
output = new BufferedOutputStream(response.getOutputStream(), 10240);
// Write file contents to response.
byte[] buffer = new byte[10240];
int length;
while ((length = input.read(buffer)) > 0) {
output.write(buffer, 0, length);
}
// Finalize task.
output.flush();
} finally {
// Gently close streams.
close(output);
close(input);
}
// Inform JSF that it doesn't need to handle response.
// This is very important, otherwise you will get the following exception in the logs:
// java.lang.IllegalStateException: Cannot forward after response has been committed.
facesContext.responseComplete();
} |
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