public IEnumerator <IImageSearchResult> ProcessQuery(string query, int maxResults)
{
string baseUri = "http://www.bing.com/images/async?q=";
string encodedQuery = HttpUtility.UrlEncode(query);
var resultsPage = Path.GetTempFileName();
WebDownloader.DownloadRemoteFile(baseUri + encodedQuery, resultsPage, userAgent, null, resultPageTimeout);
string pageContent = File.ReadAllText(resultsPage);
int count = 0;
int perPage = 35;
while (pageContent != null)
{
var resultEnumerator = ParseResultPage(pageContent);
int prevCount = count;
while (resultEnumerator.MoveNext())
{
++count;
yield return(resultEnumerator.Current);
if (count >= maxResults)
{
yield break;
}
}
if (count != prevCount && count % perPage == 0 && count < maxResults)
{
try
{
WebDownloader.DownloadRemoteFile(baseUri + encodedQuery + "&first=" + count + "&count=" + perPage,
resultsPage, userAgent, null, resultPageTimeout);
pageContent = File.ReadAllText(resultsPage);
}
catch
{
pageContent = null;
}
}
else
{
pageContent = null;
}
}
}
public void DownloadImage(IImageSearchResult result, DirectoryInfo destination, string filenamePrefix, bool downloadSourcePage)
{
var imageUri = result.ImageUri;
var filename = imageUri.Segments[imageUri.Segments.Length - 1];
filename = Regex.Replace(filename, "[\\/:*?\"<>]", "_");
var destinationPath = destination.FullName + Path.DirectorySeparatorChar + filenamePrefix + filename;
WebDownloader.DownloadRemoteFile(imageUri.AbsoluteUri, destinationPath, null, null, imageDownloadTimeout);
if (downloadSourcePage)
{
var pageUri = result.SourcePageUri;
destinationPath = destination.FullName + Path.DirectorySeparatorChar + "html";
if (!Directory.Exists(destinationPath))
{
Directory.CreateDirectory(destinationPath);
}
destinationPath += Path.DirectorySeparatorChar + filenamePrefix + filename + ".html";
WebDownloader.DownloadRemoteFile(pageUri.AbsoluteUri, destinationPath, null, null, imageDownloadTimeout);
}
}
