public void NavigateGeminiScheme(string fullQuery, System.Windows.Navigation.NavigatingCancelEventArgs e, SiteIdentity siteIdentity, bool requireSecure = true)
{
var geminiUri = e.Uri.OriginalString;
var sessionPath = Session.Instance.SessionPath;
var appDir = AppDomain.CurrentDomain.BaseDirectory;
var settings = new UserSettings();
var hash = HashService.GetMd5Hash(fullQuery);
//uses .txt as extension so content loaded as text/plain not interpreted by the browser
//if user requests a view-source.
var rawFile = sessionPath + "\\" + hash + ".txt";
var gmiFile = sessionPath + "\\" + hash + ".gmi";
var htmlFile = sessionPath + "\\" + hash + ".htm";
//delete txt file as GemGet seems to sometimes overwrite not create afresh
File.Delete(rawFile);
File.Delete(gmiFile);
//delete any existing html file to encourage webbrowser to reload it
File.Delete(htmlFile);
var uri = new Uri(fullQuery);
//use a proxy for any other scheme that is not gemini
var proxy = ""; //use none
var connectInsecure = false;
X509Certificate2 certificate;
certificate = Session.Instance.CertificatesManager.GetCertificate(uri.Host); //may be null if none assigned or available
if (uri.Scheme != "gemini")
{
proxy = settings.HttpSchemeProxy;
}
try
{
GeminiResponse geminiResponse;
try
{
geminiResponse = (GeminiResponse)Gemini.Fetch(uri, certificate, proxy, connectInsecure, settings.MaxDownloadSizeMb * 1024, settings.MaxDownloadTimeSeconds);
}
catch (Exception err)
{
//warn, but continue if there are server validation errors
//in these early days of Gemini we dont forbid visiting a site with an expired cert or mismatched host name
//but we do give a warning each time
if (err.Message == "The remote certificate was rejected by the provided RemoteCertificateValidationCallback.")
{
mMainWindow.ToastNotify("Note: the certificate from: " + e.Uri.Authority + " is expired or invalid.", ToastMessageStyles.Warning);
//try again insecure this time
geminiResponse = (GeminiResponse)Gemini.Fetch(uri, certificate, proxy, true, settings.MaxDownloadSizeMb * 1024, settings.MaxDownloadTimeSeconds);
}
else
{
//reraise
throw;
}
}
if (geminiResponse.codeMajor == '1')
{
//needs input, then refetch
mMainWindow.ToggleContainerControlsForBrowser(true);
NavigateGeminiWithInput(e, geminiResponse);
}
else if (geminiResponse.codeMajor == '2')
{
//success
File.WriteAllBytes(rawFile, geminiResponse.bytes.ToArray());
if (File.Exists(rawFile))
{
if (geminiResponse.meta.Contains("text/gemini"))
{
File.Copy(rawFile, gmiFile);
}
else if (geminiResponse.meta.Contains("text/html"))
{
//is an html file served over gemini - probably not common, but not unheard of
var htmltoGmiResult = ConverterService.HtmlToGmi(rawFile, gmiFile);
if (htmltoGmiResult.Item1 != 0)
{
mMainWindow.ToastNotify("Could not convert HTML to GMI: " + fullQuery, ToastMessageStyles.Error);
mMainWindow.ToggleContainerControlsForBrowser(true);
e.Cancel = true;
return;
}
}
else if (geminiResponse.meta.Contains("text/"))
{
//convert plain text to a gemini version (wraps it in a preformatted section)
var textToGmiResult = ConverterService.TextToGmi(rawFile, gmiFile);
if (textToGmiResult.Item1 != 0)
{
mMainWindow.ToastNotify("Could not render text as GMI: " + fullQuery, ToastMessageStyles.Error);
mMainWindow.ToggleContainerControlsForBrowser(true);
e.Cancel = true;
return;
}
}
else
{
//a download
//its an image - rename the raw file and just show it
var pathFragment = (new UriBuilder(fullQuery)).Path;
var ext = Path.GetExtension(pathFragment);
var binFile = rawFile + (ext == "" ? ".tmp" : ext);
File.Copy(rawFile, binFile, true); //rename overwriting
if (geminiResponse.meta.Contains("image/"))
{
mMainWindow.ShowImage(fullQuery, binFile, e);
}
else
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.FileName = Path.GetFileName(pathFragment);
if (saveFileDialog.ShowDialog() == true)
{
try
{
//save the file
var savePath = saveFileDialog.FileName;
File.Copy(binFile, savePath, true); //rename overwriting
mMainWindow.ToastNotify("File saved to " + savePath, ToastMessageStyles.Success);
}
catch (SystemException err)
{
mMainWindow.ToastNotify("Could not save the file due to: " + err.Message, ToastMessageStyles.Error);
}
}
mMainWindow.ToggleContainerControlsForBrowser(true);
e.Cancel = true;
}
return;
}
if (geminiResponse.uri.ToString() != fullQuery)
{
string redirectUri = fullQuery;
if (geminiResponse.uri.ToString().Contains("://"))
{
//a full url
//normalise the URi (e.g. remove default port if specified)
redirectUri = UriTester.NormaliseUri(new Uri(geminiResponse.uri.ToString())).ToString();
}
else
{
//a relative one
var baseUri = new Uri(fullQuery);
var targetUri = new Uri(baseUri, geminiResponse.uri.ToString());
redirectUri = UriTester.NormaliseUri(targetUri).ToString();
}
var finalUri = new Uri(redirectUri);
if (e.Uri.Scheme == "gemini" && finalUri.Scheme != "gemini")
{
//cross-scheme redirect, not supported
mMainWindow.ToastNotify("Cross scheme redirect from Gemini not supported: " + redirectUri, ToastMessageStyles.Warning);
mMainWindow.ToggleContainerControlsForBrowser(true);
e.Cancel = true;
return;
}
else
{
//others e.g. http->https redirect are fine
}
//redirected to a full gemini url
geminiUri = redirectUri;
//regenerate the hashes using the redirected target url
hash = HashService.GetMd5Hash(geminiUri);
var gmiFileNew = sessionPath + "\\" + hash + ".txt";
var htmlFileNew = sessionPath + "\\" + hash + ".htm";
//move the source file
try
{
if (File.Exists(gmiFileNew))
{
File.Delete(gmiFileNew);
}
File.Move(gmiFile, gmiFileNew);
}
catch (Exception err)
{
mMainWindow.ToastNotify(err.ToString(), ToastMessageStyles.Error);
}
//update locations of gmi and html file
gmiFile = gmiFileNew;
htmlFile = htmlFileNew;
}
else
{
geminiUri = fullQuery;
}
var userThemesFolder = ResourceFinder.LocalOrDevFolder(appDir, @"GmiConverters\themes", @"..\..\..\GmiConverters\themes");
var userThemeBase = Path.Combine(userThemesFolder, settings.Theme);
mMainWindow.ShowUrl(geminiUri, gmiFile, htmlFile, userThemeBase, siteIdentity, e);
}
}
// codemajor = 3 is redirect - should eventually end in success or raise an error
else if (geminiResponse.codeMajor == '4')
{
mMainWindow.ToastNotify("Temporary failure (status 4X)\n\n" + e.Uri.ToString(), ToastMessageStyles.Warning);
}
else if (geminiResponse.codeMajor == '5')
{
if (geminiResponse.codeMinor == '1')
{
mMainWindow.ToastNotify("Page not found\n\n" + e.Uri.ToString(), ToastMessageStyles.Warning);
}
else
{
mMainWindow.ToastNotify("Permanent failure (status 5X)\n\n" + geminiResponse.meta + "\n\n" + e.Uri.ToString(), ToastMessageStyles.Warning);
}
}
else if (geminiResponse.codeMajor == '6')
{
mMainWindow.ToastNotify("Certificate requried. Choose one and try again.\n\n" + e.Uri.ToString(), ToastMessageStyles.Warning);
}
else
{
mMainWindow.ToastNotify("Unexpected output from server " +
"(status " + geminiResponse.codeMajor + "." + geminiResponse.codeMinor + ") " +
geminiResponse.meta + "\n\n"
+ e.Uri.ToString(), ToastMessageStyles.Warning);
}
}
catch (Exception err)
{
//generic handler for other runtime errors
mMainWindow.ToastNotify("Error getting gemini content for " + e.Uri.ToString() + "\n\n" + err.Message, ToastMessageStyles.Warning);
}
//make the window responsive again
mMainWindow.ToggleContainerControlsForBrowser(true);
//no further navigation right now
e.Cancel = true;
}
public void NavigateNimigemScheme(string fullQuery, System.Windows.Navigation.NavigatingCancelEventArgs e, string payload, bool requireSecure = true)
{
var NimigemUri = e.Uri.OriginalString;
//at present we only support UTF8 plain text payloads
byte[] nimigemBody = Encoding.UTF8.GetBytes(payload);
var mime = "text/plain; charset=utf-8";
var settings = new UserSettings();
var uri = new Uri(fullQuery);
//use a proxy for any other scheme that is not Nimigem
var proxy = ""; //use none
var connectInsecure = false;
if (uri.Host == "localhost")
{
//to support local testing servers, dont require secure connection on localhost
//**FIX ME, or have an option
connectInsecure = true;
}
X509Certificate2 certificate;
certificate = Session.Instance.CertificatesManager.GetCertificate(uri.Host);
try
{
NimigemResponse nimigemResponse;
try
{
nimigemResponse = (NimigemResponse)Nimigem.Fetch(uri, nimigemBody, mime, certificate, proxy, connectInsecure, settings.MaxDownloadSizeMb * 1024, settings.MaxDownloadTimeSeconds);
}
catch (Exception err)
{
//warn, but continue if there are server validation errors
//in these early days of Nimigem we dont forbid visiting a site with an expired cert or mismatched host name
//but we do give a warning each time
if (err.Message == "The remote certificate was rejected by the provided RemoteCertificateValidationCallback.")
{
mMainWindow.ToastNotify("Note: " + err.Message + " for: " + e.Uri.Authority, ToastMessageStyles.Warning);
//try again insecure this time
nimigemResponse = (NimigemResponse)Nimigem.Fetch(uri, nimigemBody, mime, certificate, proxy, connectInsecure, settings.MaxDownloadSizeMb * 1024, settings.MaxDownloadTimeSeconds);
}
else
{
//reraise
throw;
}
}
if (nimigemResponse.codeMajor == '1')
{
//invalid in nimigem
HandleInvalidResponse(nimigemResponse);
}
else if (nimigemResponse.codeMajor == '2')
{
//success
if (nimigemResponse.codeMinor == '5')
{
//valid submission - get the new target to retrieve
mMainWindow.ToastNotify(String.Format("Submit successful: retrieving result: {0}", nimigemResponse.meta));
var successUri = new Uri(nimigemResponse.meta);
//must be a response redirect to gemini URL
if (successUri.Scheme != "gemini")
{
HandleInvalidResponse(nimigemResponse);
}
var geminiTarget = new GeminiNavigator(mMainWindow, mMainWindow.BrowserControl);
var normalisedUri = UriTester.NormaliseUri(successUri);
var siteIdentity = new SiteIdentity(normalisedUri, Session.Instance);
geminiTarget.NavigateGeminiScheme(successUri.OriginalString, e, siteIdentity);
}
else
{
//no other 2X responses are valid
HandleInvalidResponse(nimigemResponse);
}
}
// codemajor = 3 is redirect - should eventually end in success or raise an error
else if (nimigemResponse.codeMajor == '4')
{
//same as normal Gemini
mMainWindow.ToastNotify("Temporary failure (status 4X)\n\n" +
nimigemResponse.meta + "\n\n" +
e.Uri.ToString(), ToastMessageStyles.Warning);
}
else if (nimigemResponse.codeMajor == '5')
{
//same as normal Gemini
if (nimigemResponse.codeMinor == '1')
{
mMainWindow.ToastNotify("Page not found\n\n" + e.Uri.ToString(), ToastMessageStyles.Warning);
}
else
{
mMainWindow.ToastNotify("Permanent failure (status 5X)\n\n" +
nimigemResponse.meta + "\n\n" +
e.Uri.ToString(), ToastMessageStyles.Warning);
}
}
else if (nimigemResponse.codeMajor == '6')
{
mMainWindow.ToastNotify("Certificate required. Choose one and try again.\n\n" + e.Uri.ToString(), ToastMessageStyles.Warning);
}
else
{
mMainWindow.ToastNotify("Unexpected output from server " +
"(status " + nimigemResponse.codeMajor + "." + nimigemResponse.codeMinor + ") " +
nimigemResponse.meta + "\n\n"
+ e.Uri.ToString(), ToastMessageStyles.Warning);
}
}
catch (Exception err)
{
//generic handler for other runtime errors
mMainWindow.ToastNotify("Error getting Nimigem content for " + e.Uri.ToString() + "\n\n" + err.Message, ToastMessageStyles.Warning);
}
//make the window responsive again
mMainWindow.ToggleContainerControlsForBrowser(true);
//no further navigation right now
e.Cancel = true;
}
public bool NavigateGeminiScheme(string fullQuery, Uri uri, SiteIdentity siteIdentity, bool requireSecure = true)
{
bool navigated = true;
var geminiUri = uri.OriginalString;
var sessionPath = Session.Instance.SessionPath;
var appDir = AppDomain.CurrentDomain.BaseDirectory;
//use local or dev binary for gemget
var gemGet = ResourceFinder.LocalOrDevFile(appDir, "Gemget", "..\\..\\..\\..\\Gemget", "gemget-windows-386.exe");
var hash = HashService.GetMd5Hash(fullQuery);
//uses .txt as extension so content loaded as text/plain not interpreted by the browser
//if user requests a view-source.
var rawFile = sessionPath + "\\" + hash + ".txt";
var gmiFile = sessionPath + "\\" + hash + ".gmi";
var htmlFile = sessionPath + "\\" + hash + ".htm";
//delete txt file as GemGet seems to sometimes overwrite not create afresh
File.Delete(rawFile);
File.Delete(gmiFile);
//delete any existing html file to encourage webbrowser to reload it
File.Delete(htmlFile);
var settings = new Settings();
string command = "";
var secureFlag = requireSecure ? "" : " -i ";
if (uri.Scheme == "gemini")
{
//pass options to gemget for download
command = string.Format(
"\"{0}\" {1} --header --no-progress-bar -m \"{2}\"Mb -t {3} -o \"{4}\" \"{5}\"",
gemGet,
secureFlag,
settings.MaxDownloadSizeMb,
settings.MaxDownloadTimeSeconds,
rawFile,
fullQuery);
}
else
{
//pass options to gemget for download using the assigned http proxy, such as
//duckling-proxy https://github.com/LukeEmmet/duckling-proxy
//this should obviously be a trusted server since it is in the middle of the
//request
command = string.Format(
"\"{0}\" {1} --header --no-progress-bar -m \"{2}\"Mb -t {3} -o \"{4}\" -p \"{5}\" \"{6}\"",
gemGet,
secureFlag,
settings.MaxDownloadSizeMb,
settings.MaxDownloadTimeSeconds,
rawFile,
settings.HttpSchemeProxy,
fullQuery);
}
var result = ExecuteProcess.ExecuteCommand(command, true, true);
var geminiResponse = new Response.GeminiResponse(fullQuery);
geminiResponse.ParseGemGet(result.Item2); //parse stdout
geminiResponse.ParseGemGet(result.Item3); //parse stderr
//ToastNotify(geminiResponse.Status + " " + geminiResponse.Meta);
//in these early days of Gemini we dont forbid visiting a site with an expired cert or mismatched host name
//but we do give a warning each time
if (result.Item1 == 1 && requireSecure)
{
var tryInsecure = false;
var securityError = "";
if (geminiResponse.Errors[0].Contains("server cert is expired"))
{
tryInsecure = true;
securityError = "Server certificate is expired";
}
else if (geminiResponse.Errors[0].Contains("hostname does not verify"))
{
tryInsecure = true;
securityError = "Host name does not verify";
}
if (tryInsecure)
{
//give a warning and try again with insecure
mMainWindow.ToastNotify("Note: " + securityError + " for: " + uri.Authority, ToastMessageStyles.Warning);
NavigateGeminiScheme(fullQuery, uri, siteIdentity, false);
return(true);
}
}
if (geminiResponse.AbandonedTimeout || geminiResponse.AbandonedSize)
{
var abandonMessage = string.Format(
"Download was abandoned as it exceeded the max size ({0}) or time ({1} s). See GemiNaut settings for details.\n\n{2}",
settings.MaxDownloadSizeMb,
settings.MaxDownloadTimeSeconds,
fullQuery);
mMainWindow.ToastNotify(abandonMessage, ToastMessageStyles.Warning);
mMainWindow.ToggleContainerControlsForBrowser(true);
return(false);
}
if (File.Exists(rawFile))
{
if (geminiResponse.Meta.Contains("text/gemini"))
{
File.Copy(rawFile, gmiFile);
}
else if (geminiResponse.Meta.Contains("text/html"))
{
//is an html file served over gemini - probably not common, but not unheard of
var htmltoGmiResult = ConverterService.HtmlToGmi(rawFile, gmiFile);
if (htmltoGmiResult.Item1 != 0)
{
mMainWindow.ToastNotify("Could not convert HTML to GMI: " + fullQuery, ToastMessageStyles.Error);
mMainWindow.ToggleContainerControlsForBrowser(true);
return(false);
}
}
else if (geminiResponse.Meta.Contains("text/"))
{
//convert plain text to a gemini version (wraps it in a preformatted section)
var textToGmiResult = ConverterService.TextToGmi(rawFile, gmiFile);
if (textToGmiResult.Item1 != 0)
{
mMainWindow.ToastNotify("Could not render text as GMI: " + fullQuery, ToastMessageStyles.Error);
mMainWindow.ToggleContainerControlsForBrowser(true);
return(false);
}
}
else
{
//a download
//its an image - rename the raw file and just show it
var pathFragment = (new UriBuilder(fullQuery)).Path;
var ext = Path.GetExtension(pathFragment);
var binFile = rawFile + (ext == "" ? ".tmp" : ext);
File.Copy(rawFile, binFile, true); //rename overwriting
if (geminiResponse.Meta.Contains("image/"))
{
mMainWindow.ShowImage(fullQuery, binFile);
}
else
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.FileName = Path.GetFileName(pathFragment);
if (saveFileDialog.ShowDialog() == true)
{
try
{
//save the file
var savePath = saveFileDialog.FileName;
File.Copy(binFile, savePath, true); //rename overwriting
mMainWindow.ToastNotify("File saved to " + savePath, ToastMessageStyles.Success);
}
catch (SystemException err)
{
mMainWindow.ToastNotify("Could not save the file due to: " + err.Message, ToastMessageStyles.Error);
}
}
mMainWindow.ToggleContainerControlsForBrowser(true);
return(false);
}
return(true);
}
if (geminiResponse.Redirected)
{
string redirectUri = fullQuery;
if (geminiResponse.FinalUrl.Contains("://"))
{
//a full url
//normalise the URi (e.g. remove default port if specified)
redirectUri = UriTester.NormaliseUri(new Uri(geminiResponse.FinalUrl)).ToString();
}
else
{
//a relative one
var baseUri = new Uri(fullQuery);
var targetUri = new Uri(baseUri, geminiResponse.FinalUrl);
redirectUri = UriTester.NormaliseUri(targetUri).ToString();
}
var finalUri = new Uri(redirectUri);
if (uri.Scheme == "gemini" && finalUri.Scheme != "gemini")
{
//cross-scheme redirect, not supported
mMainWindow.ToastNotify("Cross scheme redirect from Gemini not supported: " + redirectUri, ToastMessageStyles.Warning);
mMainWindow.ToggleContainerControlsForBrowser(true);
return(false);
}
else
{
//others e.g. http->https redirect are fine
}
//redirected to a full gemini url
geminiUri = redirectUri;
//regenerate the hashes using the redirected target url
hash = HashService.GetMd5Hash(geminiUri);
var gmiFileNew = sessionPath + "\\" + hash + ".txt";
var htmlFileNew = sessionPath + "\\" + hash + ".htm";
//move the source file
try
{
if (File.Exists(gmiFileNew))
{
File.Delete(gmiFileNew);
}
File.Move(gmiFile, gmiFileNew);
}
catch (Exception err)
{
mMainWindow.ToastNotify(err.ToString(), ToastMessageStyles.Error);
}
//update locations of gmi and html file
gmiFile = gmiFileNew;
htmlFile = htmlFileNew;
}
else
{
geminiUri = fullQuery;
}
var userThemesFolder = ResourceFinder.LocalOrDevFolder(appDir, @"GmiConverters\themes", @"..\..\GmiConverters\themes");
var userThemeBase = Path.Combine(userThemesFolder, settings.Theme);
mMainWindow.ShowUrl(geminiUri, gmiFile, htmlFile, userThemeBase, siteIdentity);
}
else if (geminiResponse.Status == 10 || geminiResponse.Status == 11)
{
//needs input
mMainWindow.ToggleContainerControlsForBrowser(true);
navigated = NavigateGeminiWithInput(uri, geminiResponse.Meta);
}
else if (geminiResponse.Status == 50 || geminiResponse.Status == 51)
{
mMainWindow.ToastNotify("Page not found (status 51)\n\n" + uri.ToString(), ToastMessageStyles.Warning);
}
else
{
//some othe error - show to the user for info
mMainWindow.ToastNotify(string.Format(
"Cannot retrieve the content (exit code {0}): \n\n{1} \n\n{2}",
result.Item1,
string.Join("\n\n", geminiResponse.Info),
string.Join("\n\n", geminiResponse.Errors)
),
ToastMessageStyles.Error);
}
mMainWindow.ToggleContainerControlsForBrowser(true);
//no further navigation right now
return(navigated);
}
private void BrowserControl_Navigating(object sender, System.Windows.Navigation.NavigatingCancelEventArgs e)
{
var normalisedUri = UriTester.NormaliseUri(e.Uri);
var siteIdentity = new SiteIdentity(normalisedUri, Session.Instance);
var fullQuery = normalisedUri.OriginalString;
//sanity check we have a valid URL syntax at least
if (e.Uri.Scheme == null)
{
ToastNotify("Invalid URL: " + normalisedUri.OriginalString, ToastMessageStyles.Error);
e.Cancel = true;
}
var settings = new Settings();
ToggleContainerControlsForBrowser(false);
//these are the only ones we "navigate" to. We do this by downloading the GMI content
//converting to HTML and then actually navigating to that.
if (normalisedUri.Scheme == "gemini")
{
var geminiNavigator = new GeminiNavigator(this, this.BrowserControl);
geminiNavigator.NavigateGeminiScheme(fullQuery, e, siteIdentity);
}
else if (normalisedUri.Scheme == "gopher")
{
var gopherNavigator = new GopherNavigator(this, this.BrowserControl);
gopherNavigator.NavigateGopherScheme(fullQuery, e, siteIdentity);
}
else if (normalisedUri.Scheme == "about")
{
var aboutNavigator = new AboutNavigator(this, this.BrowserControl);
aboutNavigator.NavigateAboutScheme(e, siteIdentity);
}
else if (normalisedUri.Scheme.StartsWith("http")) //both http and https
{
var linkId = "";
////doc might be null - you need to check when using!
var doc = (HTMLDocument)BrowserControl.Document;
////this is how we could detect a click on a link to an image...
if (doc?.activeElement != null)
{
linkId = doc.activeElement.id;
}
//detect ctrl click
if (
Keyboard.IsKeyDown(Key.LeftCtrl) ||
Keyboard.IsKeyDown(Key.RightCtrl) ||
settings.HandleWebLinks == "System web browser" ||
linkId == "web-launch-external"
)
{
//open in system web browser
var launcher = new ExternalNavigator(this);
launcher.LaunchExternalUri(e.Uri.ToString());
ToggleContainerControlsForBrowser(true);
e.Cancel = true;
}
else if (settings.HandleWebLinks == "Gemini HTTP proxy")
{
// use a gemini proxy for http links
var geminiNavigator = new GeminiNavigator(this, this.BrowserControl);
geminiNavigator.NavigateGeminiScheme(fullQuery, e, siteIdentity);
}
else
{
//use internal navigator
var httpNavigator = new HttpNavigator(this, this.BrowserControl);
httpNavigator.NavigateHttpScheme(fullQuery, e, siteIdentity, linkId);
}
}
else if (normalisedUri.Scheme == "file")
{
//just load the converted html file
//no further action.
}
else
{
//we don't care about any other protocols
//so we open those in system web browser to deal with
var launcher = new ExternalNavigator(this);
launcher.LaunchExternalUri(e.Uri.ToString());
ToggleContainerControlsForBrowser(true);
e.Cancel = true;
}
}