nl.pvanassen.steam.store.listing.ListingHandle Maven / Gradle / Ivy

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A Java API to access the Steam community market through the HTTP interface. This may be against the TOS so be careful using it!

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package nl.pvanassen.steam.store.listing;

import com.google.common.io.ByteStreams;
import nl.pvanassen.steam.http.DefaultHandle;
import nl.pvanassen.steam.store.common.GenericHandle;
import nl.pvanassen.steam.store.common.Listing;
import nl.pvanassen.steam.store.helper.UrlNameHelper;
import org.codehaus.jackson.JsonNode;
import org.codehaus.jackson.map.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;

class ListingHandle extends DefaultHandle {
    private final Logger logger = LoggerFactory.getLogger(getClass());
    private final ObjectMapper objectMapper;
    private final GenericHandle listingHandle;
    private final String country;
    private final Charset charset;

    ListingHandle(ObjectMapper objectMapper, GenericHandle listingHandle, String country) {
        this.objectMapper = objectMapper;
        this.listingHandle = listingHandle;
        this.country = country;
        this.charset = Charset.forName("UTF-8");
    }

    @Override
    public void handle(InputStream stream) throws IOException {
        stream.skip(2500L);
        ByteArrayOutputStream baos = new ByteArrayOutputStream(40000);
        ByteStreams.copy(stream, baos);
        String content = new String(baos.toByteArray(), charset);
        int start = content.indexOf("\"listinginfo\"");
        if (start == -1) {
            logger.error("No listings found: " + content, new Exception());
            return;
        }
        String contentToRead = "{".concat(content.substring(start));
        JsonNode node = objectMapper.readTree(contentToRead);
        JsonNode assets = node.get("assets");
        for (JsonNode listing : node.get("listinginfo")) {
            int appId = listing.get("asset").get("appid").asInt();
            String contextId = listing.get("asset").get("contextid").asText();
            String id = listing.get("asset").get("id").asText();
            String urlName = UrlNameHelper.getUrlName(assets.get(Integer.toString(appId)).get(contextId).get(id).get("market_hash_name").asText());
            try {
                if (listing.get("price").asInt() == 0) {
                    logger.info("Item already sold");
                    continue;
                }
                Listing listingObj = new Listing(appId, urlName, listing.get("listingid").asText(), listing.get("converted_price").asInt(),
                        listing.get("converted_fee").asInt(), listing.get("converted_steam_fee").asInt(), listing.get("converted_publisher_fee").asInt(), listing.get(
                                "publisher_fee_app").asInt(), listing.get("publisher_fee_percent").asDouble(), country);
                listingHandle.handle(listingObj);
            }
            catch (NullPointerException e) {
                logger.error("Error fetching " + listing + ", " + e.getMessage());
            }
        }
    }

    @Override
    public void handleError(InputStream stream) throws IOException {
        // Ignore errors
    }
}