public bool SetWebsearch(websearch theSearch)
{
if (!Directory.Exists(PhysicalCacheDir(theSearch.status.searchterm)))
{
Directory.CreateDirectory(PhysicalCacheDir(theSearch.status.searchterm));
}
return(true);
}
public string SetSoundInSearch(websearch search, websearchsound sound)
{
if (Functions.IsEmptyString(sound.soundid))
{
sound.soundid = Guid.NewGuid().ToString();
}
string outputFileName = Functions.CombineElementsWithDelimiter(@"\", PhysicalCacheDir(search.status.searchterm), string.Format("{0}.{1}", sound.soundid, DEFAULT_EXT));
Functions.SerializeObjectToFile <websearchsound>(outputFileName, sound);
return(sound.soundid);
}
public websearch GetWebsearch(string term, IList <websearchsound> searchResultSounds)
{
websearch result = null;
//
// The directory existance is how different threads communicate. If the dir exists, this thread believes that
// another thread is currently conducting the search. It's important that the searching thread complete
// w/o errors and set the status appropriately. Otherwise, we're kind of in trouble.
//
if (Directory.Exists(PhysicalCacheDir(term)))
{
//
// If we have a directory, then we've started/done a search. New-up the object and grab the status.
//
result = new websearch();
string statusFilename = Functions.CombineElementsWithDelimiter(@"\", PhysicalCacheDir(term), STATUS_FNAME);
result.status = Functions.DeserializeObjectFromFile <websearchstatus>(statusFilename);
//
// Only return files if we're done with the search.
//
if (result.status != null && result.status.isdone == 1)
{
//
// The reason we only return files if we're done with the search is that the GetFiles() operation is a shared
// resource - read: not thread-friendly. The calling function doesn't need the results if the search isn't
// finished, and we want to return the status pretty quickly.
//
string[] sounds = Directory.GetFiles(PhysicalCacheDir(term), string.Format("*.{0}", DEFAULT_EXT));
if (sounds.Length > 0)
{
foreach (string sound in sounds)
{
websearchsound loadedSound = Functions.DeserializeObjectFromFile <websearchsound>(sound);
//
// Performance optimization: we're not going to return the sound data itself with the search
// so let's free up the mem here
//
loadedSound.soundbytes = null;
searchResultSounds.Add(loadedSound);
}
}
}
}
return(result);
}
public bool SetWebsearchStatus(websearch theSearch, websearchstatus status)
{
string statusFilename = Functions.CombineElementsWithDelimiter(@"\", PhysicalCacheDir(theSearch.status.searchterm), STATUS_FNAME);
bool result = false;
try
{
result = Functions.SerializeObjectToFile <websearchstatus>(statusFilename, status);
}
catch
{
//
// Crap, sometimes the file is in use despite the thread lock. Not sure how to debug.
//
}
return(result);
}
/// <summary>
/// Get all the sounds in the list of urls from the passed IDataSource and add the sounds to the passed websearch
/// </summary>
/// <param name="urls">The list of urls</param>
/// <param name="dataSource">The datasource to use to look for sounds</param>
/// <param name="currentSearch">The current search</param>
private static void GetSoundsOnPages(IList <dynamic> urls, IDataSource dataSource, websearch currentSearch, IList <websearchsound> searchResultList, Functions.LogMessageDelegate LogMessage, int maxDepthToFollow)
{
//const int MAX_URLS_TO_SEARCH = 20;
const int MAX_SOUNDS_PER_URL = 150;
//int urlsProcessed = 0;
HashSet <string> urlsOfObjectsSearched = new HashSet <string>();
//
// Multithreading here for requesting the pages works pretty well speed-wise. Unfortunately, the regexes bog down the
// server so badly that it becomes unresponsive for other users. So, don't do parallel on this outside loop.
//
// However, once the first page is processed, the sounds are webrequested asynchronously. So, the next page will
// start being processed while the first page's sounds are still being downloaded. This works quite well, and
// the performance is just about the same. So, let's stick with that.
//
foreach (dynamic url in urls)
{
string theUrl = url.Url;
string domain = WebProcessor.GetDomainOfUrl(theUrl);
if (unprocessableDomains.Contains(domain))
{
LogMessage(string.Format("Skipping crappy domain: {0}", domain));
}
else
{
LogMessage(string.Format("About to search for sounds on page: \"{0}\"", theUrl));
// string pageContent = WebProcessor.GetUrlContents(theUrl, null, null, LogMessage);
//
// todo: test this, make sure it works
//
string pageContent = dataSource.GetUrlContents(theUrl, null, GetUserAgent(), LogMessage);
bool wasAborted = false;
//
// todo: combine sound links func with above function
//
IList <string> linksOnPage = GetSoundLinksOnPage(pageContent, ref wasAborted);
//
// For generating test case files, set breakpoint on if (wasAborted) below with condition:
//
// maxDepthToFollow == 1
//
if (wasAborted)
{
LogMessage(string.Format("Had to abort link search on domain: {0}", domain));
lock (unprocessableDomains)
{
unprocessableDomains.Add(domain);
}
}
LogMessage(string.Format("Found {0} links on \"{1}\"", linksOnPage.Count, theUrl));
#if MULTITHREADED
Parallel.ForEach <string>(linksOnPage.Take(MAX_SOUNDS_PER_URL), partialLink => // <=-- normal operation - multithreaded
#else
foreach (string partialLink in linksOnPage.Take(MAX_SOUNDS_PER_URL)) // <=-- for debugging stuff, it's easier when not multithreaded
#endif
{
string soundLink = WebProcessor.GetUrlForObject(theUrl, partialLink);
LogMessage(string.Format("About to grab a potential sound here: \"{0}\"", soundLink));
if (!unprocessableDomains.Contains(domain) && IsNewSoundToGrab(urlsOfObjectsSearched, soundLink))
{
websearchsound receivedObject = GetWebObjectAtUrl(soundLink, null, null);
//
// enhanced search: if not a sound and is text/html and response code is 200, search for sounds on THAT page
//
if (receivedObject.issound)
{
receivedObject.sourceurl = theUrl;
receivedObject.sourceDomain = domain;
receivedObject.searchResultOrder = url.Index;
//
// Check for dups
//
string md5Hash = Functions.GetMd5Hash(receivedObject.soundbytes);
if (!HaveMd5ForSound(dataSource.CurrentSoundMd5s, md5Hash))
{
dataSource.SetSoundInSearch(currentSearch, receivedObject);
//
// Performance optimization: we're not going to return the sound data itself with the search
// so let's free up the mem here
//
receivedObject.soundbytes = null;
searchResultList.Add(receivedObject);
}
else
{
LogMessage("Not adding sound - already in collection");
}
}
else if (receivedObject.contenttype.ToLower().StartsWith("text/html"))
{
//
// We have another HTML page. Check that too?
//
if (maxDepthToFollow > 0)
{
LogMessage(string.Format("Going to drill down in this page - we're at max level: {0}", maxDepthToFollow));
GetSoundsOnPages(new List <dynamic>()
{
new { Url = soundLink, Index = url.Index }
}, dataSource, currentSearch, searchResultList, LogMessage, maxDepthToFollow - 1);
}
else
{
LogMessage(string.Format("No more drilling down, we're as low as we can go"));
}
}
}
else
{
LogMessage("Won't process: already had sound from that url, or the domain is unprocessable!");
}
#if MULTITHREADED
});
/// <summary>
/// Get all the sounds in the list of urls from the passed IDataSource and add the sounds to the passed websearch
/// </summary>
/// <param name="urls">The list of urls</param>
/// <param name="dataSource">The datasource to use to look for sounds</param>
/// <param name="currentSearch">The current search</param>
private static void GetSoundsOnPages(IList <dynamic> urls, IDataSource dataSource, websearch currentSearch, IList <websearchsound> searchResultList, Functions.LogMessageDelegate LogMessage)
{
GetSoundsOnPages(urls, dataSource, currentSearch, searchResultList, LogMessage, _maxDepthToFollow);
}
