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only compress logs larger than a certain size

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this fixes an issue where empty or very small logs
resulted in a larger compressed log, which was
truncated and cannot be decompressed
This commit is contained in:
Oliver Giles 2017-07-31 08:56:58 +03:00
parent 3068180f8e
commit 66b62f70f3
1 changed files with 24 additions and 13 deletions
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25
src/laminar.cpp
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@ -29,6 +29,8 @@
#include <boost/filesystem.hpp>
namespace fs = boost::filesystem;
#define COMPRESS_LOG_MIN_SIZE 1024
#include <rapidjson/stringbuffer.h>
#include <rapidjson/writer.h>
@ -139,14 +141,18 @@ void Laminar::sendStatus(LaminarClient* client) {
} else { // it must be finished, fetch it from the database
db->stmt("SELECT output, outputLen FROM builds WHERE name = ? AND number = ?")
.bind(client->scope.job, client->scope.num)
.fetch<str,int>([=](str zipped, unsigned long sz) {
.fetch<str,int>([=](str maybeZipped, unsigned long sz) {
std::string log(sz+1,'\0');
if(sz < COMPRESS_LOG_MIN_SIZE) {
int res = ::uncompress((unsigned char*)&log[0], &sz,
(unsigned char*)zipped.data(), zipped.size());
(unsigned char*)maybeZipped.data(), maybeZipped.size());
if(res == Z_OK)
client->sendMessage(log);
else
LLOG(ERROR, "Failed to uncompress log", res);
LLOG(ERROR, "Failed to uncompress log");
} else {
client->sendMessage(maybeZipped);
}
});
}
return;
@ -680,17 +686,22 @@ void Laminar::runFinished(Run * r) {
time_t completedAt = time(0);
// compress log
std::string zipped(r->log.size(), '\0');
std::string maybeZipped = r->log;
size_t logsize = r->log.length();
if(r->log.length() >= COMPRESS_LOG_MIN_SIZE) {
std::string zipped(r->log.size(), '\0');
size_t zippedSize = zipped.size();
::compress((unsigned char*)&zipped[0], &zippedSize,
(unsigned char*)&r->log[0], logsize);
if(::compress((unsigned char*)&zipped[0], &zippedSize,
(unsigned char*)&r->log[0], logsize) == Z_OK) {
zipped.resize(zippedSize);
std::swap(maybeZipped, zipped);
}
}
std::string reason = r->reason();
db->stmt("INSERT INTO builds VALUES(?,?,?,?,?,?,?,?,?,?,?,?)")
.bind(r->name, r->build, node->name, r->queuedAt, r->startedAt, completedAt, int(r->result),
zipped, logsize, r->parentName, r->parentBuild, reason)
maybeZipped, logsize, r->parentName, r->parentBuild, reason)
.exec();
// notify clients