private RequestFileMetadata ES5Convert(RequestFileMetadata source)
{
RequestFileMetadata destination = null;
try
{
//Transpile code to ES5 for IE11
source.ES5Content = BabelHelper.Transform(source.SourceContent, Path.GetFileName(source.SourcePath));
//Minify with AjaxMin (we don't want an additional external tool with NPM or else for managing this
//kind of thing here...
source.ES5Content = Uglify.Js(source.ES5Content).Code;
destination = source;
}
catch (Exception ex)
{
LogHelper.LogError($"On path '{source.SourcePath}': {ex.Message}.");
}
return(destination);
}
private static FileContentReference GetPatchedBlazorServerFile()
{
if (_patchedBlazorServerFile == null)
{
BlazorPolyfillOptions option = GetOptions();
if (option.UsePackagedBlazorServerLibrary)
{
//Get packaged blazor.server.js
var assembly = GetBlazorPolyfillAssembly();
var resources = assembly.GetManifestResourceNames();
var resourceName = resources.Single(str => str.EndsWith("blazor.server.packaged.js"));
using (Stream stream = assembly.GetManifestResourceStream(resourceName))
{
using (StreamReader reader = new StreamReader(stream))
{
string js = reader.ReadToEnd();
string Etag = CryptographyHelper.CreateSHA256(js);
//We should rely on ETag and not on LastModifed informations
DateTime buildTime = GetAssemblyCreationDate(assembly);
_patchedBlazorServerFile = new FileContentReference()
{
Value = js,
ETag = Etag,
LastModified = buildTime,
ContentLength = System.Text.UTF8Encoding.UTF8.GetByteCount(js).ToString(CultureInfo.InvariantCulture)
};
}
}
}
else
{
var assembly = GetAspNetCoreComponentsServerAssembly();
var resources = assembly.GetManifestResourceNames();
var resourceName = resources.Single(str => str.EndsWith("blazor.server.js"));
using (Stream stream = assembly.GetManifestResourceStream(resourceName))
{
using (StreamReader reader = new StreamReader(stream))
{
string js = reader.ReadToEnd();
#region Patch Regex
//Patch Descriptor Regex as it make Babel crash during transform
js = js.Replace("/\\W*Blazor:[^{]*(?<descriptor>.*)$/;", @"/[\0-\/:-@\[-\^`\{-\uFFFF]*Blazor:(?:(?!\{)[\s\S])*(.*)$/;");
js = js.Replace("/^\\s*Blazor-Component-State:(?<state>[a-zA-Z0-9\\+\\/=]+)$/", @"/^[\t-\r \xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000\uFEFF]*Blazor\x2DComponent\x2DState:([\+\/-9=A-Za-z]+)$/");
js = js.Replace("/^\\s*Blazor:[^{]*(?<descriptor>.*)$/", @"/^[\t-\r \xA0\u1680\u2000-\u200A\u2028\u2029\u202F\u205F\u3000\uFEFF]*Blazor:(?:(?!\{)[\s\S])*(.*)$/");
#endregion Patch Regex
//Transpile code to ES5 for IE11 before manual patching
js = BabelHelper.Transform(js, "blazor.server.js");
#region Regex named groups fix
//At this point, Babel has unminified the code, and fixed IE11 issues, like 'import' method calls.
//We still need to fix 'descriptor' regex evaluation code, as it was expecting a named capture group.
js = Regex.Replace(js, "([_a-zA-Z0-9]+)(.groups[ ]*&&[ ]*[_a-zA-Z0-9]+.groups.descriptor)", "$1[1]");
//We still need to fix 'state' regex evaluation code, as it was expecting a named capture group.
js = Regex.Replace(js, "([_a-zA-Z0-9]+)(.groups[ ]*&&[ ]*[_a-zA-Z0-9]+.groups.state)", "$1[1]");
//Here we fix invalids interopRequireWildcard(require(''.concat(n))) to _interopRequireWildcard(''.concat(n)) (works for '' or "")
//Warning: " is written "" here but must be read as " from the regex logic: We are in a verbatim string
js = Regex.Replace(js, @"(require\((['""]['""].concat\([a-zA-Z]+\))\))", "$2");
#endregion Regex named groups fix
//Minify with AjaxMin (we don't want an additional external tool with NPM or else for managing this
//kind of thing here...
js = Uglify.Js(js).Code;
//Computing ETag. Should be computed last !
string Etag = CryptographyHelper.CreateSHA256(js);
//Computing Build time for the Last-Modified Http Header
//We should rely on the creation date of the Microsoft API
//not the Blazor.Polyfill.Server one as the Microsoft.AspNetCore.Components.Server
//assembly may be updated in time. We will rely on the current creation/modification date on disk
DateTime buildTime = GetAssemblyCreationDate(assembly);
_patchedBlazorServerFile = new FileContentReference()
{
Value = js,
ETag = Etag,
LastModified = buildTime,
ContentLength = System.Text.UTF8Encoding.UTF8.GetByteCount(js).ToString(CultureInfo.InvariantCulture)
};
}
}
}
}
return(_patchedBlazorServerFile);
}