本文整理汇总了C++中StringPairArray::containsKey方法的典型用法代码示例。如果您正苦于以下问题：C++ StringPairArray::containsKey方法的具体用法？C++ StringPairArray::containsKey怎么用？C++ StringPairArray::containsKey使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类StringPairArray的用法示例。
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示例1: downloadFile
bool Updater::downloadFile(const URL& url, const File& file, int64 resume)
{
String headers;
if (resume > 0) {
headers = String("Range: bytes=") + String(resume) + String("-\r\n");
}
else if (file.exists()) {
if (!file.deleteFile()) {
return false;
}
}
StringPairArray responseHeaders;
int statusCode;
ScopedPointer<InputStream> inputStream(url.createInputStream(false, nullptr, nullptr, headers, 5000, &responseHeaders, &statusCode));
if (inputStream == nullptr) {
return false;
}
if (resume <= 0 && statusCode != 200) {
return false;
}
else if (resume > 0 && statusCode != 206) {
return false;
}
ScopedPointer<FileOutputStream> outputStream(file.createOutputStream());
if (outputStream == nullptr || outputStream->failedToOpen()) {
return false;
}
int64 length = -1;
if (responseHeaders.containsKey("Content-Length")) {
length = responseHeaders["Content-Length"].getLargeIntValue();
}
int64 pos = 0;
int64 last_pos = pos;
double start_time = Time::getMillisecondCounterHiRes();
double last_time = start_time;
double now;
int samples[DOWNLOAD_SAMPLES];
int num_samples = 0;
int next_sample = 0;
int bytes_per_second;
while (!inputStream->isExhausted() && !Thread::getCurrentThread()->threadShouldExit()) {
char buf[0x8000];
int size = inputStream->read(buf, sizeof(buf));
outputStream->write(buf, size);
pos += size;
now = Time::getMillisecondCounterHiRes();
if (now - last_time >= DOWNLOAD_UPDATE_INTERVAL) {
last_time = now;
if (length > 0) {
updater->setTaskPercent((double)pos / length);
}
samples[next_sample++] = (int)(pos - last_pos);
last_pos = pos;
if (next_sample >= DOWNLOAD_SAMPLES) {
next_sample = 0;
}
if (num_samples < DOWNLOAD_SAMPLES) {
num_samples++;
}
int64 accumulator = 0;
for (int i = 0; i < num_samples; i++) {
accumulator += samples[i];
}
bytes_per_second = (int)(accumulator / (num_samples * ((double)DOWNLOAD_UPDATE_INTERVAL / 1000)));
String message(String("Downloading ") + file.getFileName() + String(" at "));
if (bytes_per_second >= 1024 * 1024) {
message += String((double)bytes_per_second / 1024 / 1024, 2) + String(" MB/s");
}
else if (bytes_per_second >= 1024) {
message += String((double)bytes_per_second / 1024, 2) + String(" KB/s");
}
else {
message += String(bytes_per_second) + String(" bytes/s");
}
updater->setStatusText(message);
}
}
if (pos < length) {
return false;
}
now = Time::getMillisecondCounterHiRes();
bytes_per_second = (int)(pos / ((now - start_time) / 1000));
updater->setTaskPercent(1);
String message(String("Completed download of ") + file.getFileName() + String(" at "));
if (bytes_per_second >= 1024 * 1024) {
message += String((double)bytes_per_second / 1024 / 1024, 2) + String(" MB/s");
//.........这里部分代码省略.........