README.md · 魏士杰/influxdb-cpp

# influxdb-cpp

It is forked from [awegrzyn/influxdb-cxx](https://github.com/awegrzyn/influxdb-cxx), and I also modified some bug (about time and query) in this project, and transplant it to QT project

InfluxDB C++ client library
 - Writing points
 - Batch write
 - Data exploration
 - Supported transports
   - HTTP/HTTPS with Basic Auth

### Installation

__Build requirements:__
Qt 5.12.2 MSVC2017 64bit

__Integrated development environment:__
Qt Creator 4.8.2

__Dependencies:__
 cURL, boost 1.57+

## Quick start

### Write

```cpp
// Provide complete URI
auto influxdb = influxdb::InfluxDBFactory::Get("http://admin:admin@localhost:8086/?db=mydb");
influxdb->write(influxdb::Point{ "cpu" }
    .addTag("host", "localhost")
    .addTag("region", "china")
    .addField("north_latitude", 36)
    .addField("east_longitude", 114)
);
```

### Query

```cpp
// Available over HTTP only
auto influxdb = influxdb::InfluxDBFactory::Get("http://localhost:8086/?db=test");
/// Pass an IFQL to get list of points
auto points = influxdb->query("SELECT * FROM cpu");
std::cout << "query over!" << std::endl;
std::cout << "name : " << points.back().getName() <<std::endl
            << "field : "<<points.back().getFields() << std::endl
            << "timestamp : " << points.back().getTimestamp().time_since_epoch().count()  << std::endl;
```
## Libary
```
libcurl.lib
libboost_regex-vc141-mt-x64-1_67.lib
libboost_system-vc141-mt-x64-1_67.lib
libboost_date_time-vc141-mt-x64-1_67.lib
```
All of them were placed in the `./lib` folder.

## Transports

An underlying transport is fully configurable by passing an URI:
```
[protocol]://[username:password@]host:port[/?db=database]
```
<br>
List of supported transport is following:

| Name        | Dependency  | URI protocol   | Sample URI                            |
| ----------- |:-----------:|:--------------:| -------------------------------------:|
| HTTP        | cURL        | `http`/`https` | `http://localhost:8086/?db=<db>`      |

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