public IActionResult ExportAsJson([FromBody] ElasticSearchRequest request)
{
IEnumerable <ScrapedComment> history = CommentScraper.All(request.Query, request.Sort).Data;
byte[] serialized = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(history));
return(File(serialized, "application/json-download", "export.json"));
}
public void GoThroughEachPostAndGetTheCommentsOhMyGodThisWillDestroyMyLaptop()
{
const int LastScrapeAmount = 0;
int i = 0;
AllResponse <ScrapedPost> posts = PostScraper.All(new SortField[] { new SortField {
Field = "created_time", Order = SortOrder.Descending
} });
foreach (ScrapedPost post in posts.Data)
{
i++;
if (post.CreatedTime < new DateTime(2017, 04, 01))
{
continue;
}
if (i > LastScrapeAmount)
{
List <ScrapedComment> comments = CommentScraper.Scrape(post).ToList();
Console.WriteLine($"{i}/{posts.TotalCount}: {post.Id}; {comments.Count}");
}
else
{
Console.WriteLine($"{i}/{posts.TotalCount}: {post.Id}; Already scraped.");
}
}
}
public IActionResult ExportAsCSV([FromBody] ElasticSearchRequest request)
{
IEnumerable <ScrapedComment> history = CommentScraper.All(request.Query, request.Sort).Data;
byte[] serialized = CsvSerialization.Serialize(history, CsvSerialization.MapComment);
return(File(serialized, "text/csv", "export.csv"));
}
public PostScrapeController(PostScraper postScraper, CommentScraper commentScraper, PageScraper pageScraper, ElasticSearchRepository <PageMetadata> pageMetadataRepository, ElasticSearchRepository <PostScrapeHistory> postScrapeHistoryRepository)
{
PostScraper = postScraper;
CommentScraper = commentScraper;
PageScraper = pageScraper;
PageMetadataRepository = pageMetadataRepository;
PostScrapeHistoryRepository = postScrapeHistoryRepository;
}
public PostScrapeHistory ScrapePosts([FromBody] PostScrapeRequest request)
{
Debug.Assert(request != null);
Console.WriteLine("Started Scraping");
// If no specific pages were specified, scrape them all.
PageMetadata[] pages;
if (request.Pages == null)
{
pages = PageMetadataRepository.All().Data.ToArray();
}
else
{
pages = request.Pages.Select(p => PageMetadataRepository.Get(p)).ToArray();
}
int numberOfComments = 0;
ScrapedPost[] posts = PostScraper.Scrape(pages, request.Since, request.Until).ToArray();
Console.WriteLine($"Started scraping comments for {posts.Length} posts");
foreach (ScrapedPost post in posts)
{
ScrapedComment[] comments = CommentScraper.Scrape(post).ToArray();
numberOfComments += comments.Length;
Console.WriteLine(numberOfComments);
}
Console.WriteLine($"Done scraping {pages.Length} pages. Scraped {posts.Length} posts with {numberOfComments} comments");
var postScrape = new PostScrapeHistory
{
Id = Guid.NewGuid().ToString(),
Since = request.Since,
Until = request.Until,
ImportStart = posts.FirstOrDefault()?.Scraped ?? DateTime.Now,
ImportEnd = DateTime.Now,
NumberOfPosts = posts.Length,
NumberOfComments = numberOfComments,
Pages = pages
};
return(PostScrapeHistoryRepository.Save(postScrape));
}
public void ConfigureServices(IServiceCollection services)
{
// Boilerplate: add service and create Policy with options
services.AddCors(options =>
{
options.AddPolicy("CorsPolicy",
builder => builder.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader()
.AllowCredentials());
});
services.AddMvc();
services.AddSingleton(Configuration);
// Register our repositories with ASP.NET Core to allow them to be injected
// into our controllers. This preserves the same state between the controllers.
Version facebookGraphAPIVersion = new Version(Configuration["facebook:graphAPIVersion"]);
string facebookAppId = Configuration["facebook:appId"];
string facebookAppSecret = Configuration["facebook:appSecret"];
var graphClient = new GraphClient(facebookGraphAPIVersion, facebookAppId, facebookAppSecret);
services.AddSingleton(graphClient);
string elasticSearchUrl = Configuration["elasticsearch:url"];
string elasticSearchDefaultIndex = Configuration["elasticsearch:defaultIndex"];
string elasticSearchUserName = Configuration["elasticsearch:user"];
string elasticSearchPassword = Configuration["elasticsearch:password"];
var node = new Uri(elasticSearchUrl);
Func <ConnectionSettings> settings = () =>
{
var connectionSettings = new ConnectionSettings(node);
if (string.IsNullOrEmpty(elasticSearchUserName))
{
return(connectionSettings);
}
return(connectionSettings.BasicAuthentication(elasticSearchUserName, elasticSearchPassword));
};
var pageMetadataRepository = new ElasticSearchRepository <PageMetadata>(settings(), elasticSearchDefaultIndex + "-metadata-page");
services.AddSingleton(pageMetadataRepository);
var pageScrapeHistoryRepository = new ElasticSearchRepository <PageScrapeHistory>(settings(), elasticSearchDefaultIndex + "-metadata-pagescrape");
services.AddSingleton(pageScrapeHistoryRepository);
var postScrapeRepository = new ElasticSearchRepository <PostScrapeHistory>(settings(), elasticSearchDefaultIndex + "-metadata-postscrape");
services.AddSingleton(postScrapeRepository);
var pageScraper = new PageScraper(settings(), elasticSearchDefaultIndex + "-page", graphClient);
services.AddSingleton(pageScraper);
var postScraper = new PostScraper(settings(), elasticSearchDefaultIndex + "-post", pageScraper, graphClient);
services.AddSingleton(postScraper);
var commentScraper = new CommentScraper(settings(), elasticSearchDefaultIndex + "-comment", graphClient);
services.AddSingleton(commentScraper);
}
public IEnumerable <ScrapedComment> ScrapeComments([FromBody] CommentScrapeRequest request)
{
return(CommentScraper.Scrape(PostScraper.Get(request?.PostId)));
}
public PagedResponse <ScrapedComment> AllComments([FromBody] ElasticSearchRequest request)
{
return(CommentScraper.Paged(request.PageNumber, request.PageSize, request.Query, request.Sort));
}
public ScrapedComment GetComment(string id) => CommentScraper.Get(id);
public CommentScrapeController(CommentScraper commentScraper, PostScraper postScraper)
{
CommentScraper = commentScraper;
PostScraper = postScraper;
}
