public PageLoaderSettings(Uri baseUri, string extensions, int levels, DomainRestriction restrictions)
{
this.baseUri = baseUri;
this.ConfigureExtensionValidator(extensions);
this.ConfigureDomainValidator(restrictions);
this.Levels = levels < 0 ? int.MaxValue : levels;
}
private void ConfigureDomainValidator(DomainRestriction restrictions)
{
if (restrictions == DomainRestriction.SameDomainOnly)
{
this.domainValidator += u => this.baseUri.Host == u.Host;
return;
}
if (restrictions == DomainRestriction.SubdomainsOnly)
{
this.domainValidator += u => this.baseUri.IsBaseOf(u);
return;
}
this.domainValidator += u => true;
}
public RestrictionHelper(Uri baseUrl, DomainRestriction restriction, IEnumerable <string> extensions)
{
_baseUrl = baseUrl;
_domainRestriction = restriction;
_extensions = extensions;
}
public static async Task DownloadAsync(
string urlPath,
string folderPath,
int analysisnLevel = 1,
DomainRestriction domainRestriction = DomainRestriction.NoRestriction,
bool traicingMode = false)
{
if (traicingMode)
{
notifier.Notify($"\nAnalise on level {analysisnLevel}");
}
string result;
Uri uri;
try
{
uri = new Uri(urlPath);
}
catch (Exception e)
{
notifier.Notify($"----Some problems with path ({urlPath}).");
notifier.Notify($"----{e.Message}");
return;
}
try
{
if (traicingMode)
{
notifier.Notify($"Processing {uri}");
}
result = await GetDataAsync(uri);
}
catch (Exception e)
{
notifier.Notify($"----Some problems while loading from {uri} are occured.");
notifier.Notify($"----{e.Message}");
return;
}
if (traicingMode)
{
notifier.Notify($"Create new directory: {folderPath}");
}
folderPath = CreateFolder(folderPath, uri.Host);
var filePath = CreateAndFillFile(uri, folderPath, result);
if (traicingMode)
{
notifier.Notify($"Write to {filePath}");
}
if (analysisnLevel <= 0)
{
return;
}
var nodes = GetHtmlNodes(result);
if (nodes == null)
{
return;
}
foreach (var node in nodes)
{
var reference = node.GetAttributeValue("href", string.Empty);
Uri newUri;
try
{
newUri = new Uri(reference);
}
catch (Exception e)
{
notifier.Notify($"----Some problems with path ({reference}).");
notifier.Notify($"----{e.Message}");
return;
}
if (domainRestriction == DomainRestriction.InInitialURLOnly && newUri.Host != uri.Host)
{
if (traicingMode)
{
notifier.Notify($"The url isn't in initial url: {reference}");
}
return;
}
if (reference != string.Empty)
{
await DownloadAsync(reference, folderPath, analysisnLevel - 1, domainRestriction, traicingMode);
}
}
}
/// <summary>
/// Initialize a new <see cref="DomainConstraint"/> instance.
/// </summary>
/// <param name="baseUri"></param>
/// <param name="typeConstraint"></param>
public DomainConstraint(Uri baseUri, DomainRestriction typeConstraint)
{
_baseUri = baseUri;
_typeConstraint = typeConstraint;
}
public PageLoader(string startFrom, string saveTo, string extensions, int levels, DomainRestriction restriction)
{
this.baseUrl = new Uri(startFrom);
this.directory = new DirectoryInfo(saveTo);
if (!this.directory.Exists)
{
this.directory.Create();
}
this.visited = new List <string>();
this.settings = new PageLoaderSettings(this.baseUrl, extensions, levels, restriction);
}
public static async Task StartToDownloadAsync(
string url,
int analysisnLevel = 1,
DomainRestriction domainRestriction = DomainRestriction.InCurrentURLOnly,
string storage = "C:/tmp",
bool showStatusInConsole = false)
{
// set a status one time for all code
writer.SetStatus(showStatusInConsole);
writer.Write(string.Format("\nAnalyze on level {0}", analysisnLevel));
string result;
Uri uri;
try
{
uri = new Uri(url);
}
catch (Exception e)
{
writer.Write(string.Format("->Error occured in path ({0}).", url));
writer.Write(string.Format("->{0}", e.Message));
return;
}
try
{
writer.Write(string.Format("Starting to analyze the {0}", uri));
result = await GetDataAsync(uri);
}
catch (Exception e)
{
writer.Write(string.Format("->Some problems while loading from {0} are occured.", uri));
writer.Write(string.Format("->{0}", e.Message));
return;
}
#region saving in files
writer.Write(string.Format("Create new directory: {0}", storage));
storage = CreateFolder(storage, uri.Host);
var filePath = CreateAndFillFile(uri, storage, result);
writer.Write(string.Format("Saved to {0}", filePath));
#endregion
// if we choose to analyze only 1st level -then break the programm
if (analysisnLevel <= 0)
{
return;
}
var nodes = GetHtmlNodes(result);
if (nodes == null)
{
return;
}
var currentHostwithSheme = uri.Scheme + "://" + uri.Host;
var currentPageSlash = uri.ToString().LastIndexOf("/", StringComparison.Ordinal);
var currPage = uri.ToString().Substring(0, currentPageSlash);
foreach (var node in nodes)
{
// get links from nodes
var reference = node.GetAttributeValue("href", string.Empty);
Uri newUri;
try
{
if (reference.StartsWith("/"))
{
reference = currentHostwithSheme + reference;
}
else if (reference.EndsWith(".shtml"))
{
reference = currPage + "/" + reference;
}
newUri = new Uri(reference);
}
catch (Exception e)
{
// than we dont care about that - just ignore that and go ahead
// return;
continue;
}
if ((domainRestriction == DomainRestriction.InCurrentURLOnly) && (newUri.Host != uri.Host))
{
writer.Write(string.Format("The url isn't in initial url: {0}", reference));
// go ahead
continue;
}
if (reference != string.Empty && reference != currentHostwithSheme + "/")
{
await StartToDownloadAsync(reference, analysisnLevel - 1, domainRestriction, storage, showStatusInConsole);
}
}
}
