Class: PcaprLocal::DB

Inherits:
Object
  • Object
show all
Defined in:
lib/pcapr_local/db.rb

Class Method Summary collapse

Class Method Details

.get_db(config) ⇒ Object 



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# File 'lib/pcapr_local/db.rb', line 9

def self.get_db config
    database = config.fetch "database"
    base = config.fetch "uri"

    couch_url = File.join(base, database)
    db = CouchRest.database! couch_url
    patch_db db

    begin
        design = db.get("_design/pcaps") 
    rescue RestClient::ResourceNotFound
        design = CouchRest::Design.new
        design.name = "pcaps"
        design.database = db
        db.save_doc design
    end

    db.update_doc "_design/pcaps" do |design|
        design['views'] = self.views
        design
    end

    db
end

.patch_db(pcapr_local) ⇒ Object

Patch couch to include create and update times for each document.



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# File 'lib/pcapr_local/db.rb', line 35

def self.patch_db pcapr_local
    def pcapr_local.update_doc id, &block
        super(id) do |doc|
            doc = block.call doc
            doc['updated_at'] = Time.now
            doc
        end
    end

    def pcapr_local.save_doc *args
        doc = args[0]
        now = Time.now
        doc["created_at"] ||= now
        doc["updated_at"] ||= now
        super
    end

    # Performs a query and yields each row to the the supplied block.
    # Uses paging to split the query into page_size chunks.
    def pcapr_local.each_in_view view, query=nil, page_size=50 #block
        query ||= {}
        limit = page_size + 1
        query[:limit] = limit

        begin
            res = self.view(view, query)
            rows = res['rows']
            next_doc = rows.size == limit ? rows.pop : nil
            if next_doc
                query[:startkey] = next_doc['key']
                query[:startkey_docid] = next_doc['id']
            end

            rows.each do |row|
                yield row
            end
        end while next_doc
    end

    nil
end

.views ⇒ Object 



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# File 'lib/pcapr_local/db.rb', line 77

def self.views
        {
        "by_created_at" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    emit(Date.parse(doc.created_at), null);
                }
            })
        },
        "by_inode" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    emit(doc.stat.inode, null);
                }
            })
        },
        "by_filename" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    emit(doc.filename, null);
                }
            })
        },
        "by_directory" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    var paths = doc.filename.split('/');
                    paths.unshift(paths.length-1);
                    paths.pop();
                    paths.push(Date.parse(doc.created_at));
                    emit(paths,1);
                }
            }),
            "reduce" => '_sum'
        },
        "by_path" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    var paths = doc.filename.split('/');
                    paths.pop();
                    emit(paths,1);
                }
            }),
            "reduce" => '_sum'
        },
        "by_service" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap' && doc.index) {
                    var services = doc.index.services;
                    for (var i=0; i<services.length; ++i) {
                        emit([ services[i], Date.parse(doc.created_at) ], 1);
                    }
                }
            }),
            "reduce" => '_sum'
        },
        "indexed" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    if (doc.status === 'indexed') {
                        emit(doc.filename, null);
                    }
                }
            })
        },
        "queued" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    if (doc.status === 'queued' || doc.status === 'indexing') {
                        emit(doc.filename, null);
                    }
                }
            })
        },
        "by_status" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    emit([ doc.status, Date.parse(doc.created_at) ], 1);
                }
            }),
            "reduce" => '_sum'
        },
        "by_keyword" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    var keywords = {};
                    var paths = doc.filename.split('/');
                    for (var p in paths) {
                        var tokens = paths[p].toLowerCase().split(/[ -_\.\\\/\(\)]/);
                        for (var t in tokens) {
                            if (tokens[t].length > 2) {
                                keywords[tokens[t]] = true;
                            }
                        }
                    }
                                            
                    for (var k in keywords) {
                        emit([ k, Date.parse(doc.created_at) ], 1);
                    }
                }
            }),
            "reduce" => '_sum'
        },
        "statistics" => {
            "map" => %q(function(doc) {
                if (doc.type === 'pcap') {
                    emit('pcaps', 1);
                    emit('bytes', doc.stat.size);
                    if (doc.index) {
                        emit('packets', doc.index.about.packets);
                        emit('flows', doc.index.about.flows);
                        emit('services', doc.index.about.services);
                    }
                }
            }),
            "reduce" => '_sum'
        }
        }
end