Make the engine to return csv string records as documents and headers

Cargo.lock

@@ -629,7 +629,7 @@ dependencies = [
  "futures-util",
  "http",
  "indexmap",
- "log 0.4.8",
+ "log 0.4.11",
  "slab",
  "tokio",
  "tokio-util",
@@ -771,7 +771,7 @@ dependencies = [
  "http-body",
  "httparse",
  "itoa",
- "log 0.4.8",
+ "log 0.4.11",
  "pin-project",
  "socket2",
  "time",
@@ -933,14 +933,14 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
 dependencies = [
- "log 0.4.8",
+ "log 0.4.11",
 ]
 
 [[package]]
 name = "log"
-version = "0.4.8"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
+checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
 dependencies = [
  "cfg-if",
 ]
@@ -1005,7 +1005,7 @@ dependencies = [
  "itertools",
  "jemallocator",
  "levenshtein_automata",
- "log 0.4.8",
+ "log 0.4.11",
  "memmap",
  "once_cell",
  "oxidized-mtbl",
@@ -1081,7 +1081,7 @@ dependencies = [
  "iovec",
  "kernel32-sys",
  "libc",
- "log 0.4.8",
+ "log 0.4.11",
  "miow 0.2.1",
  "net2",
  "slab",
@@ -1094,7 +1094,7 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f5e374eff525ce1c5b7687c4cef63943e7686524a387933ad27ca7ec43779cb3"
 dependencies = [
- "log 0.4.8",
+ "log 0.4.11",
  "mio",
  "miow 0.3.4",
  "winapi 0.3.8",
@@ -1141,7 +1141,7 @@ checksum = "136eed74cadb9edd2651ffba732b19a450316b680e4f48d6c79e905799e19d01"
 dependencies = [
  "buf_redux",
  "httparse",
- "log 0.4.8",
+ "log 0.4.11",
  "mime 0.2.6",
  "mime_guess 1.8.8",
  "quick-error",
@@ -1228,11 +1228,12 @@ checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 [[package]]
 name = "oxidized-mtbl"
 version = "0.1.0"
-source = "git+https://github.com/Kerollmops/oxidized-mtbl.git?rev=4ca66e5#4ca66e50115da760f602e878943af59f06c53af1"
+source = "git+https://github.com/Kerollmops/oxidized-mtbl.git?rev=5426182#5426182d9ad8b74a9ebb386f03d33ce073cef0e0"
 dependencies = [
  "byteorder",
  "crc32c",
  "flate2",
+ "log 0.4.11",
  "memmap",
  "snap",
  "tempfile",
@@ -1836,7 +1837,7 @@ checksum = "32e5ee9b90a5452c570a0b0ac1c99ae9498db7e56e33d74366de7f2a7add7f25"
 dependencies = [
  "atty",
  "chrono",
- "log 0.4.8",
+ "log 0.4.11",
  "termcolor",
  "thread_local",
 ]
@@ -2015,7 +2016,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8b8fe88007ebc363512449868d7da4389c9400072a3f666f212c7280082882a"
 dependencies = [
  "futures",
- "log 0.4.8",
+ "log 0.4.11",
  "pin-project",
  "tokio",
  "tungstenite",
@@ -2030,7 +2031,7 @@ dependencies = [
  "bytes",
  "futures-core",
  "futures-sink",
- "log 0.4.8",
+ "log 0.4.11",
  "pin-project-lite",
  "tokio",
 ]
@@ -2068,7 +2069,7 @@ dependencies = [
  "http",
  "httparse",
  "input_buffer",
- "log 0.4.8",
+ "log 0.4.11",
  "rand 0.7.3",
  "sha-1",
  "url",
@@ -2211,7 +2212,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
 dependencies = [
- "log 0.4.8",
+ "log 0.4.11",
  "try-lock",
 ]
 
@@ -2226,7 +2227,7 @@ dependencies = [
  "headers",
  "http",
  "hyper",
- "log 0.4.8",
+ "log 0.4.11",
  "mime 0.3.16",
  "mime_guess 2.0.3",
  "multipart",
@@ -2265,7 +2266,7 @@ checksum = "ded84f06e0ed21499f6184df0e0cb3494727b0c5da89534e0fcc55c51d812101"
 dependencies = [
  "bumpalo",
  "lazy_static 1.4.0",
- "log 0.4.8",
+ "log 0.4.11",
  "proc-macro2",
  "quote",
  "syn",

Cargo.toml

@@ -22,7 +22,7 @@ jemallocator = "0.3.2"
 levenshtein_automata = { version = "0.2.0", features = ["fst_automaton"] }
 memmap = "0.7.0"
 once_cell = "1.4.0"
-oxidized-mtbl = { git = "https://github.com/Kerollmops/oxidized-mtbl.git", rev = "4ca66e5" }
+oxidized-mtbl = { git = "https://github.com/Kerollmops/oxidized-mtbl.git", rev = "5426182" }
 rayon = "1.3.1"
 ringtail = "0.3.0"
 roaring = { git = "https://github.com/Kerollmops/roaring-rs.git", branch = "mem-usage" }
@@ -33,7 +33,7 @@ structopt = { version = "0.3.14", default-features = false }
 tempfile = "3.1.0"
 
 # logging
-log = "0.4.8"
+log = "0.4.11"
 stderrlog = "0.4.3"
 
 # best proximity

src/bin/indexer.rs

@@ -10,8 +10,10 @@ use anyhow::Context;
 use arc_cache::ArcCache;
 use bstr::ByteSlice as _;
 use cow_utils::CowUtils;
+use csv::StringRecord;
 use flate2::read::GzDecoder;
 use fst::IntoStreamer;
+use heed::BytesEncode;
 use heed::EnvOpenOptions;
 use heed::types::*;
 use log::{debug, info};
@@ -21,8 +23,9 @@ use rayon::prelude::*;
 use roaring::RoaringBitmap;
 use structopt::StructOpt;
 
-use milli::{SmallVec32, Index, DocumentId, Position, Attribute, BEU32};
+use milli::heed_codec::CsvStringRecordCodec;
 use milli::tokenizer::{simple_tokenizer, only_words};
+use milli::{SmallVec32, Index, DocumentId, Position, Attribute, BEU32};
 
 const LMDB_MAX_KEY_LENGTH: usize = 511;
 const ONE_MILLION: usize = 1_000_000;
@@ -205,13 +208,17 @@ impl Store {
         Self::write_word_attribute_docids(&mut self.sorter, lrus)
     }
 
-    pub fn write_headers(&mut self, headers: &[u8]) -> anyhow::Result<()> {
+    pub fn write_headers(&mut self, headers: &StringRecord) -> anyhow::Result<()> {
+        let headers = CsvStringRecordCodec::bytes_encode(headers)
+            .with_context(|| format!("could not encode csv record"))?;
         Ok(self.sorter.insert(HEADERS_KEY, headers)?)
     }
 
-    pub fn write_document(&mut self, id: DocumentId, content: &[u8]) -> anyhow::Result<()> {
+    pub fn write_document(&mut self, id: DocumentId, record: &StringRecord) -> anyhow::Result<()> {
+        let record = CsvStringRecordCodec::bytes_encode(record)
+            .with_context(|| format!("could not encode csv record"))?;
         self.documents_ids.insert(id);
-        Ok(self.documents_sorter.insert(id.to_be_bytes(), content)?)
+        Ok(self.documents_sorter.insert(id.to_be_bytes(), record)?)
     }
 
     fn write_word_positions<I>(sorter: &mut Sorter<MergeFn>, iter: I) -> anyhow::Result<()>
@@ -487,9 +494,6 @@ fn index_csv(
 
     // Write the headers into a Vec of bytes and then into the store.
     let headers = rdr.headers()?;
-    let mut writer = csv::WriterBuilder::new().has_headers(false).from_writer(Vec::new());
-    writer.write_byte_record(headers.as_byte_record())?;
-    let headers = writer.into_inner()?;
     store.write_headers(&headers)?;
 
     let mut before = Instant::now();
@@ -500,7 +504,7 @@ fn index_csv(
         // We skip documents that must not be indexed by this thread.
         if document_id % num_threads == thread_index {
             if document_id % ONE_MILLION == 0 {
-                debug!("We have seen {}m documents so far ({:.02?}).",
+                info!("We have seen {}m documents so far ({:.02?}).",
                     document_id / ONE_MILLION, before.elapsed());
                 before = Instant::now();
             }
@@ -515,9 +519,6 @@ fn index_csv(
             }
 
             // We write the document in the database.
-            let mut writer = csv::WriterBuilder::new().has_headers(false).from_writer(Vec::new());
-            writer.write_byte_record(document.as_byte_record())?;
-            let document = writer.into_inner()?;
             store.write_document(document_id, &document)?;
         }
 

src/bin/search.rs

@@ -1,4 +1,4 @@
-use std::io::{self, Write, BufRead};
+use std::io::{self, BufRead};
 use std::iter::once;
 use std::path::PathBuf;
 use std::time::Instant;
@@ -70,12 +70,12 @@ fn main() -> anyhow::Result<()> {
         };
         let documents = index.documents(&rtxn, result.documents_ids.iter().cloned())?;
 
-        let mut stdout = io::stdout();
+        let mut wtr = csv::Writer::from_writer(io::stdout());
-        stdout.write_all(&headers)?;
+        wtr.write_record(&headers)?;
-
+        for (_id, record) in documents {
-        for (_id, content) in documents {
+            wtr.write_record(&record)?;
-            stdout.write_all(&content)?;
         }
+        wtr.flush()?;
 
         debug!("Took {:.02?} to find {} documents", before.elapsed(), result.documents_ids.len());
     }

src/bin/serve.rs

@@ -1,4 +1,3 @@
-use std::borrow::Cow;
 use std::collections::HashSet;
 use std::fs::File;
 use std::net::SocketAddr;
@@ -45,20 +44,25 @@ struct Opt {
     http_listen_addr: String,
 }
 
-fn highlight_string(string: &str, words: &HashSet<String>) -> String {
+fn highlight_record(record: &csv::StringRecord, words: &HashSet<String>) -> csv::StringRecord {
-    let mut output = String::new();
+    let mut output_record = csv::StringRecord::new();
-    for (token_type, token) in simple_tokenizer(string) {
+    let mut buffer = String::new();
+    for field in record {
+        buffer.clear();
+        for (token_type, token) in simple_tokenizer(field) {
             if token_type == TokenType::Word {
                 let lowercase_token = token.to_lowercase();
                 let to_highlight = words.contains(&lowercase_token);
-            if to_highlight { output.push_str("<mark>") }
+                if to_highlight { buffer.push_str("<mark>") }
-            output.push_str(token);
+                buffer.push_str(token);
-            if to_highlight { output.push_str("</mark>") }
+                if to_highlight { buffer.push_str("</mark>") }
             } else {
-            output.push_str(token);
+                buffer.push_str(token);
             }
         }
-    output
+        output_record.push_field(&buffer);
+    }
+    output_record
 }
 
 #[derive(Template)]
@@ -186,23 +190,27 @@ async fn main() -> anyhow::Result<()> {
                 .execute()
                 .unwrap();
 
-            let mut body = Vec::new();
+            let body = match index.headers(&rtxn).unwrap() {
-            if let Some(headers) = index.headers(&rtxn).unwrap() {
+                Some(headers) => {
+                    let mut wtr = csv::Writer::from_writer(Vec::new());
+
                     // We write the headers
-                body.extend_from_slice(headers);
+                    wtr.write_record(&headers).unwrap();
+
                     let documents = index.documents(&rtxn, documents_ids).unwrap();
-
+                    for (_id, record) in documents {
-                for (_id, content) in documents {
+                        let record = if disable_highlighting {
-                    let content = std::str::from_utf8(content.as_ref()).unwrap();
+                            record
-                    let content = if disable_highlighting {
-                        Cow::from(content)
                         } else {
-                        Cow::from(highlight_string(content, &found_words))
+                            highlight_record(&record, &found_words)
                         };
+                        wtr.write_record(&record).unwrap();
+                    }
 
-                    body.extend_from_slice(content.as_bytes());
+                    wtr.into_inner().unwrap()
-                }
+                },
-            }
+                None => Vec::new(),
+            };
 
             Response::builder()
                 .header("Content-Type", "text/csv")

src/heed_codec/csv_string_record_codec.rs

@@ -0,0 +1,26 @@
+use std::borrow::Cow;
+use csv::{StringRecord, Writer, ReaderBuilder};
+
+pub struct CsvStringRecordCodec;
+
+impl heed::BytesDecode<'_> for CsvStringRecordCodec {
+    type DItem = StringRecord;
+
+    fn bytes_decode(bytes: &[u8]) -> Option<Self::DItem> {
+        let mut reader = ReaderBuilder::new()
+            .has_headers(false)
+            .buffer_capacity(bytes.len()) // we will just read this record
+            .from_reader(bytes);
+        reader.records().next()?.ok() // it return an Option of Result
+    }
+}
+
+impl heed::BytesEncode<'_> for CsvStringRecordCodec {
+    type EItem = StringRecord;
+
+    fn bytes_encode(item: &Self::EItem) -> Option<Cow<[u8]>> {
+        let mut writer = Writer::from_writer(Vec::new());
+        writer.write_record(item).ok()?;
+        writer.into_inner().ok().map(Cow::Owned)
+    }
+}

src/heed_codec/mod.rs

@@ -1,5 +1,7 @@
+mod csv_string_record_codec;
 mod roaring_bitmap_codec;
 mod str_beu32_codec;
 
+pub use self::csv_string_record_codec::CsvStringRecordCodec;
 pub use self::roaring_bitmap_codec::RoaringBitmapCodec;
 pub use self::str_beu32_codec::StrBEU32Codec;

src/lib.rs

@@ -9,13 +9,14 @@ use std::collections::HashMap;
 use std::hash::BuildHasherDefault;
 
 use anyhow::Context;
+use csv::StringRecord;
 use fxhash::{FxHasher32, FxHasher64};
 use heed::types::*;
 use heed::{PolyDatabase, Database};
 
 pub use self::search::{Search, SearchResult};
 pub use self::criterion::{Criterion, default_criteria};
-use self::heed_codec::{RoaringBitmapCodec, StrBEU32Codec};
+use self::heed_codec::{RoaringBitmapCodec, StrBEU32Codec, CsvStringRecordCodec};
 
 pub type FastMap4<K, V> = HashMap<K, V, BuildHasherDefault<FxHasher32>>;
 pub type FastMap8<K, V> = HashMap<K, V, BuildHasherDefault<FxHasher64>>;
@@ -59,21 +60,17 @@ impl Index {
         })
     }
 
-    pub fn put_headers(&self, wtxn: &mut heed::RwTxn, headers: &[u8]) -> anyhow::Result<()> {
+    pub fn put_headers(&self, wtxn: &mut heed::RwTxn, headers: &StringRecord) -> heed::Result<()> {
-        Ok(self.main.put::<_, Str, ByteSlice>(wtxn, HEADERS_KEY, headers)?)
+        self.main.put::<_, Str, CsvStringRecordCodec>(wtxn, HEADERS_KEY, headers)
     }
 
-    pub fn headers<'t>(&self, rtxn: &'t heed::RoTxn) -> heed::Result<Option<&'t [u8]>> {
+    pub fn headers(&self, rtxn: &heed::RoTxn) -> heed::Result<Option<StringRecord>> {
-        self.main.get::<_, Str, ByteSlice>(rtxn, HEADERS_KEY)
+        self.main.get::<_, Str, CsvStringRecordCodec>(rtxn, HEADERS_KEY)
     }
 
-    pub fn number_of_attributes<'t>(&self, rtxn: &'t heed::RoTxn) -> anyhow::Result<Option<usize>> {
+    pub fn number_of_attributes(&self, rtxn: &heed::RoTxn) -> anyhow::Result<Option<usize>> {
         match self.headers(rtxn)? {
-            Some(headers) => {
+            Some(headers) => Ok(Some(headers.len())),
-                let mut rdr = csv::Reader::from_reader(headers);
-                let headers = rdr.headers()?;
-                Ok(Some(headers.len()))
-            }
             None => Ok(None),
         }
     }
@@ -94,13 +91,25 @@ impl Index {
         &self,
         rtxn: &'t heed::RoTxn,
         iter: impl IntoIterator<Item=DocumentId>,
-    ) -> anyhow::Result<Vec<(DocumentId, Vec<u8>)>>
+    ) -> anyhow::Result<Vec<(DocumentId, StringRecord)>>
     {
-        iter.into_iter().map(|id| {
+        let ids: Vec<_> = iter.into_iter().collect();
-            let content = self.documents.get(rtxn, &BEU32::new(id))?
+        let mut content = Vec::new();
+
+        for id in ids.iter().cloned() {
+            let document_content = self.documents.get(rtxn, &BEU32::new(id))?
                 .with_context(|| format!("Could not find document {}", id))?;
-            Ok((id, content.to_vec()))
+            content.extend_from_slice(document_content);
-        }).collect()
+        }
+
+        let mut rdr = csv::ReaderBuilder::new().has_headers(false).from_reader(&content[..]);
+
+        let mut documents = Vec::with_capacity(ids.len());
+        for (id, result) in ids.into_iter().zip(rdr.records()) {
+            documents.push((id, result?));
+        }
+
+        Ok(documents)
     }
 
     /// Returns the number of documents indexed in the database.