Improved examples [skip ci]

Author: ankane

examples/cohere/example.cpp

@@ -25,6 +25,9 @@ std::vector<std::string> fetch_embeddings(const std::vector<std::string>& texts,
         cpr::Bearer{api_key},
         cpr::Header{{"Content-Type", "application/json"}}
     );
+    if (r.status_code != 200) {
+        throw std::runtime_error("Bad status: " + std::to_string(r.status_code));
+    }
     json response = json::parse(r.text);
 
     std::vector<std::string> embeddings;

examples/hybrid/example.cpp

@@ -22,6 +22,9 @@ std::vector<std::vector<float>> fetch_embeddings(const std::vector<std::string>&
         cpr::Body{data.dump()},
         cpr::Header{{"Content-Type", "application/json"}}
     );
+    if (r.status_code != 200) {
+        throw std::runtime_error("Bad status: " + std::to_string(r.status_code));
+    }
     json response = json::parse(r.text);
 
     std::vector<std::vector<float>> embeddings;

examples/openai/example.cpp

@@ -22,6 +22,9 @@ std::vector<std::vector<float>> fetch_embeddings(const std::vector<std::string>&
         cpr::Bearer{api_key},
         cpr::Header{{"Content-Type", "application/json"}}
     );
+    if (r.status_code != 200) {
+        throw std::runtime_error("Bad status: " + std::to_string(r.status_code));
+    }
     json response = json::parse(r.text);
 
     std::vector<std::vector<float>> embeddings;

examples/sparse/example.cpp

@@ -26,6 +26,9 @@ std::vector<pgvector::SparseVector> fetch_embeddings(const std::vector<std::stri
         cpr::Body{data.dump()},
         cpr::Header{{"Content-Type", "application/json"}}
     );
+    if (r.status_code != 200) {
+        throw std::runtime_error("Bad status: " + std::to_string(r.status_code));
+    }
     json response = json::parse(r.text);
 
     std::vector<pgvector::SparseVector> embeddings;