qpdfjob-save-attachment.cc
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#include <qpdf/Pl_StdioFile.hh>
#include <qpdf/QPDFJob.hh>
#include <qpdf/QPDFLogger.hh>
#include <qpdf/QUtil.hh>
// This example demonstrates how we can redirect where saved output goes by calling the default
// logger's setSave method before running something with QPDFJob. See qpdfjob-c-save-attachment.c
// for an implementation that uses the C API.
int
main(int argc, char* argv[])
{
auto whoami = QUtil::getWhoami(argv[0]);
if (argc != 4) {
std::cerr << "Usage: " << whoami << " file attachment-key outfile" << '\n';
exit(2);
}
char const* filename = argv[1];
char const* key = argv[2];
char const* outfilename = argv[3];
std::string attachment_arg = "--show-attachment=";
attachment_arg += key;
char const* j_argv[] = {
whoami,
filename,
attachment_arg.c_str(),
"--",
nullptr,
};
QUtil::FileCloser fc(QUtil::safe_fopen(outfilename, "wb"));
auto save = std::make_shared<Pl_StdioFile>("capture", fc.f);
QPDFLogger::defaultLogger()->setSave(save, false);
try {
QPDFJob j;
j.initializeFromArgv(j_argv);
j.run();
} catch (std::exception& e) {
std::cerr << whoami << ": " << e.what() << '\n';
exit(2);
}
std::cout << whoami << ": wrote attachment to " << outfilename << '\n';
return 0;
}